PLATE L. 



Page 



Periechocrinus necis (Wincb. aud Marc}-) 524 



Fig. la. Posterior side of an internal cast. (Coll. W. G. Egan.) 

 lb. Ventral aspect of another cast. (Same collection.) 



Periechocrinus infelix W. and M 525 



2a. An interior cast in a side view. (Same collection.) 



21). Ventral aspect of an internal cast. (Same collection.) 



2c. Lateral view of a specimen figured by S. A. Miller as Saccocrinns Egani. 



(Same collection.) 

 2d. Ventral aspect of anotber cast, figured as S. Egani. (Same collection.) 



Periechocrinus ornatus Hall and Wbitf 527 



3a. Gutta-percba cast from a mould in the rock, showing surface markings; 



posterior side. (After Hall and Whitfield.) 

 ^h. Anterior view of an internal cast. (After Hall and Whitfield.) 



Periechocrinus ten.\esseensis (Hall) 528 



4. Posterior view of Eoemer's type specimen. (After Eoemer.) 



Periechocrinus urniformis (S. A. Miller) 526 



5a. Posterior view of an internal cast. (Coll. W. C. Egan.) 

 5i. Ventral aspect of another cast. (Same collection.) 



Periechocrinus speciosus (Hall) 521 



G«. The type specimen. (After Hall.) 



6/). Part of an arm enlarged. (After Hall.) 



Periechocrinus marcouanus (Winch, and Marcy) 523 



la. Side view of an internal cast; anal side to the left. (Coll. W. C. Egan.) 

 lb. Anterior view of the dorsal cup. (Same collection.) 



