PLATE XL 



AVICULOPECTEN CRASSICOSTATA H. & 



_ 1 188. 

 Fig. 1. View of left valve. 



Oypricardinia inflata (Oonr.), var. subequivalvis H. & W. 



Page 189. 

 Figs. 2, 3. Right valves enlarged. 

 Fig. 4. A left valve enlarged. 



Oypricardinia f cylindrica H. & W. 



Page 190. 

 Figs. 5, 6. Left valve and cardinal view. 



NUCULITES TRIQUETRA GoilV. 



Page 199. 

 Fig. 7. Cast of a left valve. 



NVCULA NIOTICA H. & W. 

 Page 190. 

 Fig. 8. The cast of a right valve twice enlarged. 

 Fig. 11. A right valve showing surface-markings ; twice enlarged. 



Nucula Ned a H. & W. 



Page 191. 

 Figs. 9, 10. The right and left sides of an internal cast ; enlarged two diameters. 



LlMOPTERA CANCELLATA Var. OCCIDENS H. & W. 



Page 199. 

 Fig. 12. View of the left side. 



" 13. A cardinal view showing the anterior muscular impressions. 

 " 14. A view of the right side of the upper portion of the specimen. 

 " 15. An enlargement of the surface. 



Dystactella {Tellinomya) subnasuta H. & W. 



Pages 191 and 192. 

 Figs. 16, 17. Right and left sides of the specimen ; the latter an internal cast. 



YOLDIA ? VALVULUS H. & W. 

 Page 190. 

 Figs. 18-20. Left, right and cardinal views of the same specimen. 



