244 ORGANIC REMAINS. 



more properly belongs to Sowerby's new genus euomphalus, Tab. 

 45, 46, 52 ; or rather, as the aperture has not been angular but quite 

 round, it may be assigned to his genus cirrus, Tab. 141 ; although 

 the spire is much more flat than that of any species described by 

 him. It has a deep and wide umbilicus, displaying the interior of 

 the whirls. — ^The Scarborough Catalogue, after Mr. Parkinson, 

 notices shells of this kind under the genus delphinula. 



Nerita. Nerite. To this genus must be assigned No. 2, PI. 

 XI, from the oolite, two inches long, and of equal breadth. It has 

 some resemblance to n. glaucina ; but as we cannot speak with cer- 

 tainty, either of its umbilicus or its lips, -we shall only add, that it is 

 a smooth shell, except that the body whirl is marked with the lines 

 of growth, and a few faint transverse striae at the base. Perhaps we 

 should consider it as n. maxima of Dillwyn. — No. 5 is a beautiful 

 little shell, also from the oolite, of a yellow colour, deeply cancella- 

 ted. As the aperture is raai'ginated, it is akin to n. marginata of 

 Dillwyn, if not the same species. 



Patella. Limpet. No. 12 is a small limpet, pretty common 

 in our lias nodules. Sowerby names it p. IcBvis, Tab. 139, Fig. 3, 4. 



Dentalium. Tooth-Shell. No. 13 is a group of dentalia from 

 the lowest shale, belonging to d. entalis, or a species akin to it. 

 These shells are often found compressed and broken. The inside is 

 a white spar, frequently decomposed. Dentalia, both round and 

 angular, occur in the oolite. 



Seepula. Numbers of serpulites, in almost all their multifari- 

 ous shapes, occur in the oolite, the alum shale, and other strata, 

 generally adhering to other shells. No. 14, from the dogger at Peak, 

 is a group of serpulites, of a species resembling s. afra, having about 

 three whirls. A similar shell is figured by Parkinson, III. PI. VII. 

 Fig. 8. The same serpula occurs in the upper shale. 



