62 



MOLLUSCA 



19. F. cuRTUs^The Short Fusus, pi. XXX VI. fig. 5, 6. 

 Fusus curtus. Fleming, Brit. An. p. 353. Murex curtus. 



Sowerby, Min. Conch. II. p. 227, pi. 199, % 5- 



Shell ovate, ventricose; spire short, consisting of four ab- 

 ruptly tapering volutions, terminating in a rather obtuse apex, 

 with about twelve longitudinal, rounded, undulating ribs upon 

 each volution ; crossed by numerous, sharp, somewhat distant 

 striK, which become rather stronger on the base of the shell ; 

 aperture oval, a little pointed above and below, and ending in a 

 short, slightly curved, and narrow canal ; pillar lip shghtly re- 

 flected on the columella ; outer lip thin, internally striated with 

 elevated lines. 



The substance of the shell being thin, gives the costjE the appear- 

 ance of concave undulations internally. 



Found in the Blue Clay, Highgate Hill. 



20. F. ECHINATUS. — The Spined Fusus, pi. XXXVI. fig. 



9, 10. 



Fusus echinatus. Fleming, Brit. An. p. 353. Sowerby, 

 Min. Conch. II. p. 226, pi. 199, fig- 4, 4. 



Shell elongated, turroted ; spire long, consisting of five ven- 

 tricose volutions, well defined by a deep suture; the whole shell 

 covered with numerous, longitudinal, sharp ribs, crossed by re- 

 mote, transverse, elevated, rounded stri», which preserve their 



Fusus. 

 F. CABiNELLUS.^ — Small-Keeled Fusus, pi. XXXVI. fig. 



23. 



24, 25. 



Fusus carinella. Fleming, Brit. An. p. 353. Murex cari- 

 nella, Sowerby, Min. Conch. II. p. 196, pi. 187, fig. 3, 4. 



Shell considerably elongated; spire rather short, consisting of 

 six convex volutions, along the middle of which, as well as the 

 body, there is a sub-carina, produced by one of the stria;, which 

 is more prominent than the others; whole shell with many lon- 

 gitudinal ribs, crossed by numerous, strong, elevated, unequal, 

 spiral striaj ; aperture oblong-ovate, rounded above, somewhat 

 contracted below, and terminating in a long, nearly straight, 

 open canal; inner lip narrowly reflected on the columella above, 

 widening as it descends, and ending in a sharp point at the 

 base ; outer lip thin, even, and with the striae shining through, 

 from the thinness of the shell. 



Found in the London Clay at Barton Cliff. 



24. F. FicuLNEDS. — The Fig-like Fusus, pi. XXXV. fig. 



8,9. 



Fusus _ficulneus. Sowerby, Min. Conch. III. p. 166,* pi. 

 291, fig. 7, 7. Fleming, Brit. An. p. 352. Murex turgidus, 

 Brander, Foss. Hant. p. 26, pi. 4, fig. 56. 



Shell ovate, sub-fusiform, ventricose ; spire short, consisting 

 of five slightly rounded volutions, flattened at top, and termi- 

 nating in a sharp apex, with many longitudinal, depressed ribs ; 



thickness in passing over the ribs, producing the appearance of the margin of the depressed portions of the volutions is fur- 



elevated angular spines ; aperture ovate, terminating in a short 

 and slightly curved canal ; inner lip not reflected on the pillar, 

 and the striae continued over the columella ; outer lip a little 

 thickened and striated internally. 

 Found in the Crag at Maiden. 



21. F. CANCELLATUS The Latticed Fusus, pi. XXXVI. 



fig. 15, 16. 



Fiisus cancellalus. Sowerby, Min. Conch. VI. p. 45, pi. 

 525, fig. 2. 



Shell considerably elongated ; spire long, consisting of five 

 ventricose volutions, with a sharp apex; covered with acute, 

 longitudinal, and transverse ribs, producing a beautiful cancel- 

 lated appearance, viith four or five rows of cells to each volu- 

 tion, the whole intersections provided with short spines; aper- 

 ture elongated, somewhat contracted above, and terminating 

 below in a short, slightly curved, open canal ; base of the beak 

 even. 



Found in the Crag of Norfolk and Suffolk. 



22. F. Heywoodii. — Heywood's Fusus, pi. XXXVI. fig. 

 13, 14. 



Murex Peruviantts. Sowerby, Min. Conch. V. p. 47, pi. 

 434, fig. 1, 1. 



Shell oblong-ovate ; spire about half the length of the shell, 

 consisting of five or six subturreted, inflated volutions; general 

 surface smooth, provided with fourteen or fifteen thin, laminated, 

 elevated, longitudinal ribs, and several varices ; aperture ovate, 

 somewhat rounded above, and contracted below into a long, 

 narrow, slightly twisted canal; inner lip smooth, slightly reflected 

 on the columella; outer lip thin, a little produced above. 



Found in the Crag at Woodbridge. 



I have named this shell in honor of James Hey wood, Esq., of 

 Acresfield, Pendleton, a zealous and expert geologist. 



This is not the F. Peruvianus of Lamarck. 



nished with a row of more or less acute tubercles, and in some 

 instances double, beneath which the space is concave, and from 

 whence the costae eminate ; base and part of the beak provided 

 with pretty strong, transverse strife ; aperture oblong-ovate, a 

 little pointed above, and ending below in a short, oblique, rather 

 wide canal ; inner lip broadly reflected on the columella above, 

 narrower below, and with a single plait near its base ; outer lip 

 expanded, and even on the edge. 



Found in the London Clay at Hordwell Cliff. 

 25. F. BULBiFORMis. — The Bulb-shaped Fusus, pi. XXXV. 

 fig. 12, 13. 



Fusus hulhifurmis. Sowerby, Min. Conch. III. p. 165, pi. 

 291, fig. 1 to 6. Fleming, Brit. An. p. 352. 3Iurex Bulbus, 

 Brander, Foss. Hant. p. 27, pi. 4, fig. 54. Murex Pyrus, lb. 

 p. 27, pi. 4, fig. 52, 53. Fusus bulbiformis, Lamarck, Env. de 

 Paris, 62. 



Shell ovate, ventricose, nearly smooth ; spire mucronated, 

 very short, about a sixth of the whole length of the shell, con- 

 sisting of six volutions, ending in a short apex; aperture oblong- 

 ovate, contracted above and below, and terminating in a short, 

 shghtly curved canal ; inner lip smooth, broadly reflected on the 

 columella, with a slight protuberance inside near the top, which 

 produces a subcanaliculate depression above the upper angle of 

 the aperture ; outer lip thick, smooth, and sharp on the edge ; 

 beak with obsolete striae. 



Found in the London Clay at Hordwell, and the New Forest, 

 Hampshire. 



This shell is subject to several varieties : 



a. With the pillar lip plaited within. 



yS. Spire more elevated, and beak more produced, than in the 

 variety described, which is the type of the species, with a concave 

 furrow at the upper part of each volution. 



7. Spire considerably produced ; shell longer than in the type ; 

 volutions subventricose, with a deep, rounded, obtuse canal on the 

 upper part of each volution of the spire. 



