131 



it would bo useless to si)eculate on its possible specific relations. Its 

 muscular scars are very different to those of Anisomyon alveolus of Meek 

 and Hayden, which it closely resembles in other respects. 



CiNULIA OBLIQUA, GaBB. 



Cinulia obliqua, Gabb.— Pal. Cal., Vol. 1, p. Ill, pi. 19, figs. 64, 64ffl, b, c. 



Middle Shales, Division D, of the north-west side of Hornby Island. 

 Lower Shales, Division B, of the south-west side of Denmaa Island. Pro- 

 ductive Coal Measures, Division A, at Nanaimo Eiver, V. I., two and a- 

 half miles up, at Protection, Gabriola and Salt Spring or Admiralty 

 Islands, also at the Sucia Islands. Appai-ently the most abundant gas- 

 teropod of the Nanaimo and Comox coal fields, as it was met with in 

 almost every locality examined by Mr. Eichardson. 



CiNULioPsis, New Genus. 



Shell like that of Cinulia, Gray, as recently re-defined by Meek,* but 

 with the aperture distinctly notched or rather deeply sinuated in 

 front, also with the outer lip not thickened externally. 



The affinities of this genus are at present doubtful. Its proper place 

 may possibly be in the family Bingiculidce, between Ringicula and 

 Cinulia proper, but the emargination of the aperture in front, which 

 indicates the probable existence of a respiratory siphon or siphonal 

 fold in the animal, seems to point to a nearer relationship with the 

 Siphonostomata than with the Holostomata. In Cinulia the anterior 

 margin of the aperture is entire or nearly so, and the outei- lip is much 

 thickened. 



CiNULIOPSIS TYPICA. (N. Sp.) 

 Plate 16, figures 7, la and 76. 



Shell ovately subpyriform, spire very short; body whorl ventricose in 

 the middle and narrowing somewhat rapidly below. Aperture elongated, 

 much longer than Avide, broadly convex on the outer and nearly straight 

 on the inner side. Columellar lip spreading into a thick, broad, rounded 

 callus above, contracted in the middle, narrow and produced below. 

 Columella bearing a single, rather prominent and very oblique spiral fold 

 near its anterior termination, into which it ultimately merges. Outer lip 

 simple, continuous with ihe columellar callus above, deeply channelled 

 and emarginate at its junction with the columella below. When the shell 



* Report on the Invertebrate Cretaceous and Tertiary Fossils of the Upper Missouri Country, 

 p. 383. 



