﻿38 Bulletin 20 116 



PLATE III. 



Leiorhynchus utahensis n. sp 2 7 



Fig. 1. Ventral valve of the type specimen. Paradise P. 0., 

 Utah, (x 1) 

 ia. Front profile view of the same specimen, (x i) 

 ib. View of a small dorsal valve. Paradise P. 0., Utah, (x 1) 

 ' ic. View of a ventral valve. Paradise P. 0., Utah, (x i) 



Athyris parvula 2 9 



Fig. 2. A ventral view. Livingston, Mont, (x 2) 



2a. View of the beaks of the same individual, (x 2) 



2b. Dorsal view of specimen with ventral beak slightly broken. 



Livingston, Mont, (x 1) 

 2C. Front view of same specimen. 



Athyris montanensis n. sp ....... . 3° 



Fig. 3. A dorsal view.. Princeton, Mont, (x 2) 

 3 a. A ventral view of the same specimen. 

 3b. A front view of the same individual. 



Spirifer occidentalis n. sp 3° 



Fig. 4. A ventral view. Princeton, Mont, (x 2) 

 4a. Dorsal view of the same specimen. 

 4b. Front view of the same specimen. 

 4c. Side profile view of another individual. Princeton, Mont. 



(x 3 ) 

 4d. View of shell with ventral beak ground to show the septae 

 in umbonal cavity. Princeton, Mont, (x 3) 



