Explanation of Plate V. 



All figures about natural size. Drawings by C. McK. Beede. 



Ceriocrinus harshhargeri. 



Fig. 1. Right posterior view of type. 

 Fig. la. Diagram of anal plates of same. 

 Fig. 16. Surface detail enlarged. 

 Fig. lc. Diagram of basal view. 



Fig. 2. Calyx of another specimen, probably of this species. 

 Fig. 2a. Diagram of a portion of posterior view of another slightly smaller speci- 

 men, showing variation in size of anal plate. 



Aviculopecten subequivalvus. 



Fig. 3. View of type. One side incomplete. 

 Fig. 3a. Opposite valve of another specimen. 



Pinna lata. 



Fig. i. View of type, a left valve. 



Pleurophorus whitei. 



Fig. 5. Type specimen ; cast of a left valve on the same slab as the two following 



and the cephalothorax of a large limuloid. 

 Fig. 5a. Cast of a broken specimen, showing the anterior muscular impressions. 

 Fig. 56. Specimen of different outline. 



Allorisma Jcansasensis. 



Fig. 6. Imperfect cast, showing strong concentric undulations impressed upon it. 

 Fig. 6a. Lateral view of type. Shell exfoliated in front. 



