58 



MOLLUSCA. 



Typhis. 



obtuse ; body bicarinated, which become obsolete in the spire ; 

 whole shell covered with regular elevated strife, which are 

 obscurely decussated by the lines of growth ; aperture subquad- 

 rangular ; canal very short and nearly straight. 

 Found at Blackdown. 



13. M. SEXDENTATUS. — The Six-toothed Murex, pi. 

 XXXIV. fig. 17, 18. 



M'lire.v se.vdentatus. Sowerby, Min. Conch. V. p. 10, pi. 

 411, fig. 3. 



Oblong-ovate ; spire nearly as long as the body, consisting of 

 five ventricose volutions, well defined by the suture; whole 

 shell provided with numerous longitudinal ribs, which, with the 

 intervals between them, are decussated with strong, sharp, spiral 

 striae ; aperture elongated ; slightly narrowed beneath ; inner 

 lip smooth, behind which at its termination is a subumbilicus ; 

 outer lip somewhat thickened with five or six obtuse teeth 

 inside. 



Discovered at Colwell Bay, Isle of Wight, by Professor 

 Sedgwick. 



14. M. TORTUOSUS -The Tortuous Murex, pi. XXXIV. 



fig. 29, 30. 



Murex turluosus. Sowerby, Min. Conch. V. p. 48, pi. 434, 

 fig. 2. 



Turreted ; spire consisting of four or five broad volutions ; 

 body and spire with three elevated flexuous subfoliaceous 

 varices, with two or three knobs between each ; and crossed by 

 wide-set, transverse, nearly obsolete ribs upon the middle and 

 lower portion of the volutions, and a fourth situate near the 

 superior part of the volutions ; beak short, slightly bent ; aper- 

 ture oblong-ovate ; inner lip smooth, a little reflected on the 

 columella; outer lip rather thin and straight, thickened within. 



A Crag fossil, found at Woodbridge, by Mrs. Cobbold. 



15. M. Haccanensis The Hackness Murex, pi. XXXIV. 



fig. 28. 



3Iure.v Haccanensis. Phillips, Geo. York, I. p. 102, pi. 4, 

 fig. 18. 



Turreted; spire abruptly tapering, with six or seven volutions; 

 with nine or ten strong, elevated, longitudinal ribs, transversely 

 striated; aperture obovate; outer lip thin; base of body with 

 several nearly obsolete, transverse folds. 



Found in the Coralline Oolite at Hackness. 



Gknus XX.— TYPHIS._i?/emm^. 



Shell subcylindrical, subturreted; volutions provided 

 with numerous cylindrical, pervious processes; aperture 

 suborbicular; beak short, with a closed tubular canal. 



T. nsTULOsus — The Pipe Typhis, pi. XXXIV. fig. 



1. 



5,6. 



Murex Jtstulosus. 

 12. Sowerby, Min. 

 Brander, fig. 82. 

 p. 356. 



Subcylindrical, provided with several thick, somewhat fohated 

 varices, each terminating above in a slightly recurved tube, 

 most of which arc truncated ami porfurated ; spire short, con- 



Brocchi, Sub. App. II. p. 394, pi. 7, fig. 

 Conch. II. p. 201. Murex pungims. 

 Typhis Jistulosiis, Fleming, Brit. An. 



sisting of four or five rapidly decreasing volutions, and termi- 

 nating in an acute apex ; aperture entire, subovate ; both lips 

 continuous, the left or outer one with a marginal foliated 

 varixo, and four or five sinuated fimbriae behind ; beak nearly 

 straight, closed in front, and obliquely truncated below. 



In old shells the beak is frequently double, and sometimes even 

 triple ; diameter of the shell about half its length. 



Found at Barton ChflT. 



2. T. TUBiFER. — The Tubular Typhis, pi. XXXIV. fig. 

 3, 4. 



Murex tuhifer. Lamarck, Env. de Paris, p. 54. Parkinson, 

 Org. Remains, III. p. 65, pi. 5, fig. 15. Murex pungens, 

 Brander, p. 35, fig. 81. M. horridas, Brocci, Sub. App. II. p. 

 405, pi. 7. Typhis tuhifer, Fleming, Brit. An. p. 356. 



Oblong-ovate, with four or five rapidly decreasing volutions, 

 each furnished with four or five longitudinal rows of tubular 

 spines, generally set in threes, between each of which is placed 

 a solitary, erect, somewhat arcuated tube, situate upon the 

 superior portion of the volution, a little pointed, somewhat 

 oblique, sometimes double, and open at the base. 



Found at Barton Cliff, in the London Clay. 



In the young state the beaks of this species, as well as that of 

 fistiilosus, are open. 



Genus XXI RANELLA Lamarck. 



Shell oval or oblong; subcompressed ; with depressed, 

 straight or slightly oblique distichous varices, situated at 

 intervals of half a volution, forming a continuous longi- 

 tudinal row on each side; aperture subovate; base canali- 

 culated, and frequently with a small canal above, at the 

 junction of the outer and inner lips; outer lip grooved 

 with its edge crenated or dentated; inner lip usually 

 rugose; the outside more or less tuberculate, frequently 

 set in small bead-like rows, and generally covered with a 

 thickish oli^'aceous epidermis. 



1. R. Bartonensis The Barton Ranella, pi. XXXV. 



fig. 1, 2, 3. 



Murex Bartonensis. Sowerby, Min. Conch. I. p. 77, pi. 

 34. Three lower figures. 



Oblong-ovate ; spire about half the length of the body, con- 

 sisting of four gently tapering somewhat rounded volutions, ter- 

 minating in an obtuse apex ; the body and two lower volutions 

 of the spire with numerous, nearly straight, longitudinal ribs, 

 the interstices being crossed by fine, regular, transverse stria?, 

 producing a beautifully cancellated appearance; aperture ob- 

 liquely elongated, curved, and acute at both extremities; having 

 a shallow groove or canal above, and with an oblique canal 

 below ; inner lip smooth and broadly reflected on the columella, 

 somewhat raised, and extending to nearly the superior region of 

 the body, where it is continuous with the outer lip, which is 

 undulate, the margin also very broad, and toothed within, with 

 a furrow which extends from the fourth tooth to the beak ; 

 inner lip also toothed; beak short, thick, and curved. 



Not quite half an inch in length. 



Found at Barton Cliff, by the Rev. W. Bingloy. 



