114 NEW YORK STATE MUSEUM 



FLATE 6 



Trematospira multistriata Hall 



Page 43 

 Fio. 



], 2 Dorsal views showing the character of the exterior 



3 Dorsal view of a smaller shell with strongly duplicate 



plications 



4 Enlargement of the surface of the shell. x5 



Meristella lentiformis sp. nov. 



Page 44 



5, 6 Dorsal and profile views of a characteristic specimen 

 7 Dorsal view of an internal cast showing the existence 

 of a strong median septum in the brachial valve 

 8-10 Dorsal, profile and ventral views showing the character- 

 istic contour of the species 

 11 Internal cast of the pedicle-valve showing the strong 

 muscular scar 



Meristella ? vascularia sp. nov. 



Page 45 



12-14 Internal casts of the jiedicle- valve showing strong dental 

 lamellae, pedicle cavity and muscular impressions and 

 the radiating sinuses over the vascular region 



Cyrtina varia sp. nov. 



Page M 



15 Enlargement of the surface showing its pustulose character 

 16-18 Anterior, posterior and profile views of an average 

 specimen 

 19 Anterior view of a larger specimen with convex pedicle- 

 valve 

 20-22 Three views of a smaller specimen 



