114 NEW YORK STATE MUSEUM 



PLATE 6 



Trematospira multistriata Hall 



Page 43 

 Pro. 



1, 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 pedicle- valve showing strong dental 

 lamellae, pedicle cavity and muscular impressions and 

 the radiating sinuses over the vascular region 



Cyrtina varia sp. nov. 



Page 49 



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 



