22 



4. J. longiuscula, pi. VIII, I. 8. — Fii I Ed pi. 51, f. 8; 

 Buccinum longiuscubim, Walker, Min. Sh., f. (JO; Adams, 

 Micros., pi. 14, f. 2G. 



Shell taper; consisting of six smooth, glossy, pellucid, gradu- 

 ally tapering volutions, well defined by the suture, and termi- 

 nating in an acute apex ; aperture oblong, slightly contracted 

 above, and widened beneath ; outer lip thin, even ; columella 

 smooth, with a tooth-like process near its centre. Length an 

 eighth of an inch; breadth not half its length. 



Found in Faversham Creek. 



0. J. obtusa, pi. IX, f. 38 First Ed., pi. 50, f. 38. 



Shell subcylindrical; with five white, glossy, somewhat tumid, 

 and gradually tapering volutions, terminating in an obtuse apex; 

 with five longitudinal ribs; aperture subrotund, slightly con- 

 tracted above; outer lip plain; columella with a prominent, 

 oblique, tooth-like process near its centre. Length an eighth 

 (jf an inch ; breadth not half its length. 



Found at Dunbar, by General Bingham. 



6. J. pullus, pi. IX, f. 1 1 — First Ed., pi. 50, f. 1 1 . 



Shell subconic ; with six slightly rounded volutions, termi- 

 nating in an obtuse apex ; the whole shell invested by five flat 

 spiral ribs ; aperture subovate, slightly contracted above ; outer 

 lip plain ; columella furnished with a sharp tooth-like process 

 near its centre ; whole shell of a pale flesh colour, and not 

 glossy. 



Found by me on the beach at Montrose. 



7. J. alba, pi. VIII, f. 18 — First Ed., pi. 51, f. 18; Valuta 

 alba, Montagu, p. 235; lb., Sup., p. 101 ; Walker, Min. Sh., f. 

 61 ; Adams, Micros., pi. 14, f. 27; Maton and Racket, Linn. 

 Trans., VIII, p. 130; Turton, Brit. Fauna., p. 170. 



Shell opaque and glossy ; with four finely striated volutions ; 

 aperture long, narrow, straitened above, and rounded beneath. 

 Length a tenth of an inch. 



Found at Sandwich and Shepey Island. 



8. J. insculpta ; Turbo insculptus, Montagu, Sup., p. 129; 

 Odostomia insculpta, Fleming, Brit. An., p. 310. 



" Shell subpellucid, white, and taper ; with five or six mode- 

 rately convex volutions, finely and regularly striated throughout, 

 in a spiral direction; apex obtusely pointed; aperture subovate; 

 pillar lip with a faint duplicature, forming a subumbilicus, and 

 furnished with a small tooth. Length one-eighth of an inch ; 

 breadth one-third its length. 



" This rare shell, from the coast of Devon, must not be con- 

 founded with the Turbo xemi.striaUe, (Rissoa scmistriatte, p. 1 1, 

 pi. IX, f. 3,) which is vastly broader in proportion, and is desti- 

 tute of a tooth." — Montagu. 



<). J. bidentata, pi. VIII, f. 7 — First Ed., pi. 5 1 , f. 7 ; Valuta 

 bidentata, Montagu, Sup., p. 100, pi. 30, f. 2. 



Shell strong, thick, conic, smooth, glossy white ; with six or 

 seven volutions, tapering abruptly to an acute apex ; a few dis- 

 tant, longitudinal, wrinkles undulate the suture; body lar^e, 

 occupying two-thirds the length of the shell; aperture narrow, 

 somewhat oblique, contracted above, and rounded below; outer 

 lip thick, plain; columella much thickened, and folding back 

 forms a subumbilicus behind, and provided with three tooth-like 

 plications in front. Length a quarter of an inch ; breadth about 

 half its length. 



Found plentifully on the south coast of Devonshire; and at 

 Dunbar. Frith of Forth. 



MOLLUSCA. [Trachelipoda. 



Subdivision 1 1. — With teeth on the outer lip. 



10. J. denticulata, pi. VIII, f. 6 First Ed., pi. 51, f . G ; 



Valuta denticulata, Montagu, p. 234, pi. 20, f. 2; Walker, Min. 

 Sh., f. 50 and f. 53, young; Turton, Brit. Fa., p. 170. 



Shell subcylindrical ; with seven or eight gradually tapering, 

 flat, semipellucid volutions, terminating in an acute apex ; body 

 large, in proportion to the size of the spire ; aperture oblong- 

 oval, nearly half the length of the shell ; outer lip furnished 

 with two or three tubercles near the margin, and frequently 

 with three or four white denticulations within the margin of 

 the aperture ; columella provided with three or four oblique 

 white plica>, which are much produced, and have a tooth-like 

 appearance. Length nearly half an inch ; breadth not a 

 quarter. 



This species is subject to some variety in the denticulations 

 on the outer lip ; some have more and others less, and young 

 shells are destitute of them ; the plications on the columella 

 also vary from two to four, but the usual number is three. 



Found on the shore at Plymouth, and other parts of the 

 south Devonshire coast ; at Barnstable and Isracomb, in the 

 north ; near Aberavon, Wales ; and at Southampton ; Dublin 

 Bay, Ireland ; and Dunbar, Frith of Forth. 



11. J. r/uinquedens, pi. VIII, f. 11 First Ed., pi. 51, 



f. 11. 



Shell strong, thick, conic, smooth, white, and opaque ; with 

 six volutions; spire tapering abruptly, and terminating in an 

 obtuse apex; aperture a little oblique, narrow, contracted above, 

 and rounded below; outer lip thin, provided internally with five 

 tooth-like processes, the upper one largest; columella slightly 

 thickened, and furnished with two strong, acute, prominent 

 teeth-like processes in front, the upper one cleft. Length a 

 quarter of an inch ; breadth about half its length. 



I found this shell on the beach at Prestonpans, nine miles 

 east of Edinburgh. 



Genus 27 — Cominia Brown. 



Shell elongated, tapering to both extremities; spire of medium 

 length ; aperture elongated and narrow ; columella furnished 

 with several oblique, spiral grooves, or folds, and subcanaliculale 

 at the base. 



1. C. hyalina, pi. VIII, f. 9 First Ed., pi. 51, f. 9; 



Jaminia hyalina; Voluta hyalina, Montagu, Sup., p. 101. 



Shell with six flat, pellucid, smooth volutions, tapering to an 

 obtuse apex, and very indistinctly defined by the extremely 

 small line of the suture; body occupying about half the length 

 of the shell ; aperture much elongated and narrow, a little con- 

 tracted above; base truncated and canaliculated ; outer lip 

 smooth, plain, and sharp at the edge; columella with seven or 

 eight fine, oblique, thread-like plications. Length a quarter of 

 an inch ; breadth not more than one-third its length. 



Found near Dunbar, by Captain Laskey. 



Family IV Mackostoma. 



Shells auriform, with a very wide spreading aperture, and the 

 margins disunited; destitute of a columella and operculum. 



