PLATE LXIII. 



Page 

 Physetoceinus oknatus (Hall) 597 



Fig. 1. Antero-lateral view of a specimen with arms. (Coll. W. and Sp.) 



2. Posterior view of the calyx. (Same collection.) 



3. Ventral aspect, showing annular impression made by a Cupula, which covered 



the anal opening. (Same collection.) 



4. Anterior view of a large, slightly crushed specimen. (Same collection.) 



Phtsetoceinus Copei (Miller) 598 



5. Side view of large specimen. (Same collection.) 



Physetoceinus venteicosus (Hall) 593 



6. Type of the variety internodlus Hall. (Mus. Comp. Zool.) 



Physetoceinus aspee Meek and Worthen 596 



la. Posterior view of the type specimen. (Mus. Comp. Zool.) 

 lb. Ventral aspect of the same. 



Physetoceinus lobatus W. and Sp 599 



8«. Side view of the calyx. (Coll. W. and Sp.) 

 8i. Ventral aspect of the calyx. (Same collection.) 



Teleioceinus althea (Hall) 632 



9. Lateral view of the type specimen. (Mus. Comp. Zool.) 



