EXPLANATION OF THE PLATES AND WOOD-CUTS. 



Fig. 8. Turritella assimilis. Turrited, whorls convex, ornamented with 6 or 7 carinae, 

 of which 2 or 3 are obscure, the 2nd and 5th being prominent. Height li inch, 

 diameter 5 Hnes. 



A smaller, narrower species than the last. 

 Log. Soomrow. 

 Fig. 9. Terebra reticulata. Subulate ; sides of the whorls flat, cancellated ; a narrow- 

 upper portion of each whorl divided from the lower in the form of a band by a 

 ridge and furrow ; beak short, curved. 



In some specimens the transverse or spiral Hnes are less conspicuous, particu- 

 larly on the band and the upper half of the whorl. 

 Loc. Soomrow. 

 Fig. 10. Cerithium rude. Subulate, with curved sides, ribbed and furrowed ; ribs 

 numerous, cut across by about 5 square furrows, of which the uppermost is distant 

 from the suture; whorls 10 or 12, nearly flat, with an obtuse varix between each — 

 the last varix very prominent ; aperture nearly round, with a canal at the upper 

 angle ; inner lip thick, with a callus at the top ; beak broken. Height 2 inches 8 

 lines, diameter about 8 lines. 

 Loc. Soomrow. 

 Fig, 1 1. Cerithium corriigatum. Subulate, ribbed and coarsely striated ; i*ibs nume- 

 rous, arched, and prominent, crossed by deep striae ; whorls 8 or more, rather 

 convex, with a distinct varix upon each. 



This has much of the contour of an elongated Fusus. The lip and beak are 

 wanting in the only specimen found. 

 Loc. Soomrow. 

 Fig. 12. Fusus ? granosus. Short-fusiform, ribbed ; ribs about 12 upon each whorl, 

 divided into grains by 6 or 7 transverse ridges, convex ; spire half the length of 

 the shell ; beak suddenly contracted. Height 4 lines. 



A pretty shell, much resembling some species of Nassa which occur in the Crag. 

 Loc. Soomrow. 

 Fig, 13. Fusus Ideviusculiis. Short, fusiform, ribbed, and striated ; ribs irregular, mostly 

 very short; whorls 6, angular; base conical; beak short. Height 10 lines, dia- 

 meter 5 lines. 

 Loc. Soomrow. 

 Fig, 14. Fusus nodulosus. Fusiform, elongated, ribbed and strongly striated; ribs 

 short, broad, about 8, in the middle of each whorl ; whorls 6 or 7, concave above, 

 convex below ; beak contracted. 

 Loc. Soomrow. 

 Fig. 15. Fusus [Murex'^.) hexagonus. Short-conical, with an elongated beak, 6-angled ; 

 whorls about 6, v/ith 6 ribs on each, which form the angles of the spire, and are 

 crossed by 3 strong ridges upon the spire, thickened where they cross, convex ; 

 beak suddenly contracted. 

 Loc. Soomrow. 

 Fig. 16. Ranella Bufo. Conical, with 2 rows of thin expanded varices and several 

 ribs, the whole crossed by 3 or 4 prominent and several intermediate thin ridges ; 



