Fusus. MOLLUSCA. MURICIDjE. 353 



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



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

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

 aperture obovate. — 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, Soiver. 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 

 Crag. 



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

 about ten longitudinal undulations, that intersect many deepish transverse 



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



Park, Org. Rem. iii. p. 64. t. v. f. 1C — Sower. Min. Conch v t. xxxiv., upper 

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



17- F. trilineatus — 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 — London 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. — Murex 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. interrupts — Subturrited ; body covered by broad transverse sulci ; 



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



int. Pilkington, Linn. Trans, vii. 1 17- t- xi. f. 5. — Sower. Min. Conch, t. ccciv. 

 — London Clay. 



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

 rinated ; base produced ; beak short ; aperture subrhomboidal. — Murex 

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



VOL. I. Z 



