PLATE XI Continued. 



Page. 

 TELLINOMYA CONTRACTA? 76 



Fig. 15. Left valve, enlarged to two diameters. 

 15 a. Interior of a smaller specimen. 



HYOLITHES VANUXEMI 35 



Figs. 16, 16 a. Views of the ventral and dorsal sides, enlarged to two diameters. 

 166. Transverse section of the tube. 



COLEOPRION MINUTA 85 



Figs. 17, 17 c. Lateral views of a straight and slightly curved tube, enlarged to four diam- 

 eters. See plate xii, fig. 21. 



MACLUREA SUBANNULATA 82 



Fig. 18. View of the upper side, showing the depressed character of the spire and the an- 



nulations on the cast of the outer whorl. 

 18 a. View of the lower side of the same specimen. 



18 b. Section of the outer whorl. 



MACLUREA ANNULATA 81 



Fig. 19. View of the lower side, showing the annulations of the outer surface of the shell, 

 enlarged to two diameters. 



19 a. Internal cast of the lower side, similarly enlarged. 



MACLDREA CARINATA 82 



Fig. 20. View of the lower side, showing the strong surface striae. 



20 a. Cast of the lower side. 



RAPHISTOMA NASONI 78 



Figs. 21, 21 a. Lateral and summit view of small specimen. 



PLEUROTOMARIA LONENSIS 80 



Fig. 22. Lateral view of the specimen from Lone Mountain. Natural size. 



