144 JOURNAL OF CONCHOLOGY, VOL. I5, NO. 5, JANUARY, I917. 



BoREOTROPHON CLATHRATUS Linn?eus, sp. 

 Fig. 4. — Natural sandstone cast of a dorsal view, showing the equi- 

 distant longitudinal costas, prominent sulcations, and short 

 anterior canal. [B.M., Kennard Coll.]. 



ScALA SUBULATA J, de C Sowerby, sp. 

 Fig. 5. — Dorsal aspect of specimen with eight inflated whorls, pos- 

 sessing distant, oblique, lamelliform costae, otherwise the 

 surface is smooth. From a gutta percha model, x 2. 



[B.M., Prestwich Coll.]. 



Capiluna GRyECA Linnseus, sp. 



i^/;'. 6. — External view exhibiting the familiar clathrate sculpture 

 formed by the radial and concentric costse. From a gutta- 

 percha model. [M.P.G., No. 450]. 



Fig. 7. — Sandstone cast of interior of another specimen, showing the 

 oblong perforation and remains of radial striations at the 

 basal margin. [M.P.G., No. 450]. 



Emarginula fissura Linnaeus. 

 Fig. 8. — Lateral aspect of an example with the typical latticed sculp- 

 ture, X 2. From a gutta-percha model. [M.P.G., No. 448]. 



Papillicardium papillosum Poll, sp. 

 Fig. g. — External view of a right valve, showing the minutely papil- 

 lose costse and the concentrically striated furrows. From a 

 wax impression. [B.M.., Graham Wallas Coll.]. 



Fig. 10. — Magnified surface ornamentation of same specimen. 



Volsella barbata Linnaeus, sp. 

 Fig. II. — External view of a right valve, showing the numerous con- 

 centric wrinklings or ridges of this species with obscure 

 radial striae. From a wax impression. 



[B.M., Graham Wallas Coll.]. 



IsocARDiA HUMANA ( = cor) Linnseus, sp. 

 Fig. 12. — Right lateral aspect of a small example with closed valves, 

 preserved as a natural sandstone cast, showing internal 

 characters. The figure gives a much foreshortened view of 

 the specimen to exhibit the involute umbo and prominent 

 lunuloid cavity. [M.P.G., No. 15878]. 



Manupecten pesfelis Linnseus, sp. 

 Fig. IJ. — External view of a right valve indicating the closely fasci- 

 culate character of the riblets. 



