Fusus. MOLLUSCA. MURICID^. 353 



13. F. cariiiella Rather elongated, with many longitudinal undulations, 



crossed by strong elevated unequal strije ; whorls convex, subcarinated in 

 the middle, the last contracted towards the beak ; beak open, rather slender ; 

 aperture ohovate.— Sower. Min. Conch, t. clxxxvii. f. 3, 4. 



14. F. striatus Shell ventricose, with many transverse rounded projec- 

 tions, and from three to five parallel striae between each, crossed by other 

 striae or sutures ; whorls from three to six ; beak nearly straight ; aperture 



oval Murex striatus, Sower. Min. Conch, t. xxii. A variety occurs in which 



three or four of the spiral ridges are more prominent than the rest, espe- 

 cially the upper ones, t. cxix — In Crag. 



15. F. contrarius — Whorls reversed, five or six, slightly expanded at the 

 upper part, and contracted towards the beak : surface with many rounded 

 projections, or smooth ; aperture irregularly ovate ; beak rather short. — 

 Murex con. Park. Org. Rem. t. vi. f. 5 — Sower. Min. Conch, t. xxiii. — In 

 Ci-ag. 



16. F. rugosus — Spire acute, of about six whorls, rather gibbose, with 

 about ten longitudinal undulations, that intersect many deepish transverse 



strise; beak nearly straight, lip thick; canal rather broad Murex rug. 



Park., Org. Rem. iii. p. 64. t. v. f. 16 — Sower. Min. Conch._t. xxxiv., upper 

 figures, and t. cxix. f. 1, 2 — In Crag. 



17. F. tnlineatus- — Shell elongated, with many transverse projecting nar- 

 row bands, each obscurely divided into three threads ; whorls five or six ; 

 beak straight, pointed ; aperture elongated, several folds within the outer 

 lip. — Murex tril. Sower. Min. Conch, t. xxxv. f. 4, 5. — Lrnidon Clay. 



18. F. latus — Shell slightly ventricose, smooth, covered with alternately 

 large and small transverse linear projections ; whorls five, upper part of each 

 undulated ; aperture strongly striated within ; beak straight, expanded, 

 truncated. — ]\Iurex latus. Sower. Min. Conch, t. xxxv. left hand lower figure. 

 — Plastic Clay, Plumstead. 



19. F. costellifer. — Subturrited, transversely striated, longitudinally cos- 

 tated ; whorls rather ventricose ; aperture ovate, expanded towards the beak ; 

 beak very short, spreading ; costae numerous, slender — Murex cost. Sower. 

 Min. Conch, t. cxix. f. 3. — In Crag. 



20. F. echinatus. — Turrited ; whorls round, reticulated, with acute tubercles 

 upon the angles of the meshes ; outer-lip striated within, beak short. — Mu- 

 rex ech. Sower. Min. Conch, t. cxix. f. 4. — In Crag. 



21. F. curtus — Ovate, pointed, subventricose, longitudinally ribbed, trans- 

 versely striated ; aperture oval ; beak short, recurved ; whorls internally 



striated with elevated lines. — Murex curt. Soiver. Min. Conch, t. cxix. f. 5. 



London Clay. 



22. F. gradatus. — Ventricose, longitudinally ribbed, transversely striated ; 

 spire short, acute ; costae varicose above ; aperture oval, with a short ex- 

 panded beak.— Murex grad- Sower. Min. Conch, t. cxix. f. 6 Plastic Clay, 



Plumstead. 



23. F. interruptiis — SubtuiTited ; body covered by broad transverse sulci ; 



the remaining whorls smooth, with two sulci along their upper edges Murex 



int. Pilkington, Linn. Trans, vii. 11 7. t. xi. i'. 5.— Sower. Min. Conch, t. ccciv. 

 — London Clay. 



24. F. Cfuadratus. — Short, conical, transversely striated and obscurely bica- 

 rinated; base produced; beak short; aperture subrhomboidal. _ .'Vlurex 

 quad. Sower. Min. Conch, t. ccccx. f i.— Green Sand. 



VOL. I. y 



