Involute.] 



MOLL USC A. 



inch, breadth about an eighth ; colour pale chestnut brown. We found this off 

 St Abb's Head, Frith of Forth.— In our own Cabinet. 



13. F. crassus, pi. V, f. 8-9— First Ed., pi. 48. f. 8-9. 



Shell thick, strong, smooth, fusiform ; spire consisting of five volutions, abruptly 

 tapering to rather an obtuse apex; with ten nearly straight, smooth, longitudinal, 

 white ribs, which do not reach the base in front ; body and spire nearly of equal 

 length ; aperture elongated, radiform, much narrowed both above and below ; outer 

 lip plain, inner Up slightly reflected on the columella ; colour white, with a very broad 

 dark chestnut spiral belt, girdling the centre of the body, and extending to the apex, 

 at the base of the volutions. Length nearly half an inch, breadth not half its length. 

 We found this species at Prestonpans, near Edinburgh. — In Lady Jardine's Cabinet. 



14. F. attenuates, pi. V, f. 37-38.— First Ed., pi. 48, f. 37-38; Montagu, 

 p. 266, pi. 9, f. 6. 



Shell very fusiform, slender, consisting of eight volutions ; spire as long as the 

 body, tapering very abruptly to a fine point ; the volutions well defined by the suture ; 

 with nine equidistant, strong, elevated, smooth, longitudinal arcuated ribs, rising in 

 the middle of each volution ; lower part of the bo^y much attenuated ; aperture nar- 

 row, considerably contracted at the canal, which is long and straight; outer lip 

 thickened at the back by a rib ; inner lip plain ; colour pale yellowish white. 

 Length half an inch, breadth little more than an eighth. Found in sand at Fal- 

 mouth Harbour, Biddeford Bay, South Wales, and at Dunbar. 



15. F. gracilis, pi. V, f. 16-17 First Ed., pi. 48, f. 16-17; Murex gracilis; 



Montagu, p. 267. pi. 15, f. 5 ; Murex emarginatus ; Donovan, pi. 169, f. 2. 



Shell fusiform, slender; body and spire of equal length, tapering to a fine point; 

 volutions ten, with eleven or twelve rather close, longitudinal, convexly arcuated 

 ribs, which do not continue throughout the shell, but are separated at the suture of 

 the spire by a flat space, at which point the strise are uninterruptedly continued 

 spirally throughout the shell ; the whole shell crossed by numerous striae ; the ribs do 

 not extend to the base of the body, where the striae are stronger and more distant ; 

 canal moderately long, ascending; outer lip a little spread, margin arcuated; inner 

 lip very slightly thickened ; colour purplish brown. Length seven-eighths of an 

 inch, breadth two-eighths. Found in Biddeford Bay, Devonshire, at Tenby, WaLs, 

 and in Dublin Bay. 



16. F. ndmla, pi. V, f. 10. — First Ed., pi. 48, f. 10; M. nebula; Montagu, 

 p. 267, pi. 15, f. 6 ; Murex acuminutus ; Pennant. IV, pi. 79. 



Shell with taper, costated volutions, terminating in a sharp pointed apex ; longi- 

 tudinally and spirally striate, giving it a reticulated appearance as if covered with 

 gauze; volutions rather depressed, scarcely elevated above the ribs ; the suture very 

 fine ; aperture narrow, oblong-oval, the canal turning a little to the one side ; outer 

 lip sharp ; inner lip replicate, smooth, glossy ; colour various, sometimes yellowish 

 white, at others pale brownish, purplish, or rufous ; but the most beautiful variety 

 is of a bluish colour, with the decussated stria? white. Length half an inch, breadth 

 two-tenths. Found at Falmouth, the south coast of Devonshire, particularly at 

 Eiddeford Bay, Tenby, and Laugharne, Wales, Portmarnock, and Dublin Bay, 

 Ireland. 



17. F. septangularis, pi. V, f. 11.— First Ed., pi. 48, f. 11. 



Shell with seven or eight taper, longitudinally ribbed, strong volutions, termin- 

 ating in an acute apex ; the ribs are seven in number, running from the base to the 

 tip of the spire, scarcely interrupted by the suture ; the intermediate spaces are but 

 moderately concave, which gives the shell a heptagonal appearance ; aperture oblong- 

 oval, ending in a short canal ; outer lip sharp at the cd^e, thickened at the back by 

 a ridge, the upper part contracted to an angle, where the margin is a little indented ; 

 pillar lip somewhat replicated ; colour purplish brown, and somewhat glossy. Found 

 at Falmouth, Salcomb Bay, Weymouth, and the south coast of Devonshire. 



18. F. accinctus, pi. V, f. 14-15. — First Ed., pi. 48, f. 14-15 ; Murex accinctus; 

 Montagu, Sup. p. 114. 



Shell taper, with six or seven costated volutions ; the ribs are slightly angulated, or 

 more elevated in the middle of each volution, with fine spiral strife ; aperture oblong ; 

 canal short ; lip entire at the upper angle ; colour yellowish white, with an obsolete 

 brown band in the middle of the body, which continues up the spire of the shell, at 

 the base of each volution ; this band, when examined with a lens, is observed to 

 be constituted of four or five contiguous thread-like lines of a brown colour, in the 

 depressions between the strise. Length four lines ; breadth one line. Found in 

 the Frith of Forth by Captain Laskey. 



19. F.rufus, pi. V, f. 47-48— First Ed., pi. 48, f. 47-48; Murex rufus ; 

 Montagu, p. 263. Maton and Racket, Linn. Trans., VIII, p. 144. 



Shell taper, fusiform; spire consisting of five volutions ; fifteen or sixteen longitu- 

 dinal ribs extend from the base to the apex, the whole shell covered with very fine 

 spiral striae ; aperture narrow, oblong, terminating in a short canal ; outer lip smooth, 

 rarely thickened by a rib ; pillar lip smooth, covered by the ribs ; colour pale ru- 

 fous brown, sometimes chestnut. Length three-tenths of an inch ; breadth one- 

 eighth. Found at Sandwich, Biddeford Bay, Devonshire, Dorsetshire, coast of 

 Wales, and Portmarnock, Ireland. 



20. F. proximus, pi. V, f. 34 First Ed., pi. 48, f. 34. Montagu, Sup. p. 118, 



pi. 30, f. 8. 



Shell thick, white, with six strongly costated volutions ; apex moderately pointed ; 

 aperture ovate-oblong , outer lip remarkably broad, and reflexed ; the canal short, 

 and rather spreading at the end. Length nearly half an inch. 



This figure and description are taken from Montagu, who says, " This shell might 

 readily be mistaken for an extraordinary growth of Murex (Fusus) costatus, but it 

 differs materially from that species in the number of ribs, being possessed of eleven on 

 the body or lower volution, whereas the costatus never has more than eight, and 

 usually only seven, and these are broader." Found by Captain Laskey, on Tyning- 

 ham Sands, near Dunbar. 



We have not been able to identify this with any of the species met with in the 

 Frith of Forth ; it differs from them all in the shortness of the aperture, in propor- 

 tion to the length of the body ; in this respect the nearest approach to it is the fol- 

 lowing :— 



21. F. alius, pi. V, f. 61-62— First Ed., pi. 48, f. GI-62. 



Shell white, fusiform ; spire consisting of five abruptly tapering volutions, with ten 

 longitudinal smooth ribs ; the interstices with very fine, close-set spiral strijE ; apex 

 smooth ; aperture oblong, terminating in a very short canal ; outer lip thickened, 

 smooth ; pdlar lip smooth. Length three-eighths of an inch ; breadth about an 

 eighth. Found at Dunbar by General Bingham. Very rare. 



22. F. purpureus, pi. V, f. 25.— First Ed., pi. 48, f. 25; Murex purpurea* ; 

 Montagu, p. 260, pi. 9, f. 3 ; Maton and Racket, Linn. Trans., VIII, p. 148. 



Shell strong, very rugose ; spire with eight or nine rounded volutions, tapering to 

 an extremely fine sharp point ; nineteen or twenty longitudinal, somewhat oblique 

 ribs, traverse the shell, crossed by numerous sharp elevated ridges, which rise into 

 angles upon the ribs, producing sharp protruding knobs, giving the shell a cancellated 

 appearance, and feeling very rough to the touch ; aperture narrow, oval, terminating 

 in a strait canal ; outer lip thin, exteriorly tuberculate, internally striate, and cren- 

 ated; columella desJitute of ribs, obliquely striated transversely, and slightly tuber- 

 culate ; inside purple, marked by the ribs ; generally of a deep purple or brownish 

 purple. Length five-eighths of an inch ; breadth a quarter of an inch. Found at 

 Salcomb, Devonshire, Tenby, Wales, and Portmarnock, Ireland. 



This is one of the most elegant of our British univalves. 



23. F. pnnctatus pi. V, f. 56-57.— First Ed., pi. 48, f. 56-57. 



Shell fusiform, strong, thick, somewhat turreted ; spire with five slightlv defined 

 volutions ; body long ; the whole shell covered with many regular series of square 

 and deep punctures, like those of a thimble ; external surface smooth, yellowish 

 white ; aperture oblong-ovate, acute above, ending in a very short canal interiorly 

 punctated; outer lip thickened, slightly tuberculate on its edge ; pillar lip punctated 

 like the rest of the shell. Length nearly three-eighths of an inch; breadth an 

 eighth and a half. We found this pretty shell at Holy Island, coast of Northum- 

 berland. — In Lady Jardine's Cabinet. 



24. F. subnigris, pi. V, f. 58-59— First Ed., pi. 48, f. 58-59. 



Shell fusiform, spire consisting of five well defined volutions, abruptly tapering to 

 a point, and terminating in an obtuse apex ; ten thick longitudinal ribs traverse the 

 whole shell, crossed by strong distant stria?, producing a cancellated appearance ; 

 aperture ovate, ending in a very short canal ; outer lip smooth, thickened; base of 

 columella smooth ; colour very dark reddish brown, approaching to black in 

 some specimens. Length three-tenths of an inch ; breadth about an eighth of an 

 inch. We first discovered this species at St Cyrus, Kincardineshire ; and it was 

 subsequently sent to us by our late friend General Bingham, who found it plentifully 

 on Fuel, at Penzance, Cornwall. 



25. F. turriculus, pi. V, f. 51-52.— First Ed., pi. 4S t f. 51-52. Montagu, 

 p. 262, pi. 9, f. 5 ; Maton and Jacket, Linn. Trans., VIII, p. 144. 



Shell fusiform, turreted ; spire occupying about a third of the shell, with six or 

 seven volutions, terminating in an acute apex ; volutions strongly defined, flattened 

 or cylindrical, rising above each other perpendicularly, the top of each being almost 

 quite flat, the whole shell covered with numerous, rather thin, longitudinal ribs, 

 which suddenly decline towards the suture, on the depressed top of each volution, 

 the interstices with very fine close-set spiral stria? ; body sub-cylindrical, abruptly- 

 acuminate beneath ; aperture oblong-ovate, terminating in a rather long, somewhat 

 oblique broad canal ; outer lip thin, sometimes thickened by a rib a little angulated 

 towards the top, produced by the spiral depression ; inner lip smooth, glossy, and 

 whke, very broadly reflected on the columella; colour cream white. Length three 

 quarters of an inch; breadth rather more than a quarter. Found at Sandwich, 

 Kent ; Biddeford Bay, Devonshire ; Tenby and Laugharne, Wales ; Frith of Forth, 

 and Portmarnock, Ireland. 



26. F. decussates, pi. V, f. 53 and 55.— First Ed., pi. 48, f. 53 and 55. 



Shell fusiform ; spire short, consisting of five well rounded abruptly tapering vo- 

 lutions, .separated by a deep suture, and little more than a third the length of the 

 body ; twelve strong longitudinal ribs cover the shell from the venter to the apex, 

 crossed by distant strong spiral striae, giving the shell a cancellated appearance ; 

 body abruptly acuminate beneath ; aperture sub-ovate, terminating in a very long 

 narrow and pointed canal, equal in length to the body, the opening in front being 

 very strait ; outer lip somewhat thickened and entire, and continuous along the co- 

 lumella, on which it is narrowly reflected ; colour cream whita. Length one inch 

 five-eighths; breadth an inch. We found this shell at Killough, county of Down, 

 Ireland. 



27. F. Bawffius, pi. VI, f. 1 and 4— First Ed., pi. 47, f. 1 and 4; Murex 

 Bamffius ; Montagu, Sup. p. 117 ; Donovan, V, pi. 169, f. 2 ; Maton and Racket, 

 Linn. Trans., VIII, p. 149. 



Shell fusiform, spire consisting of six well-dciiuen, ventricose, and abruptly taper- 



