PLATE XLVIIL 



Page 



Megistocrinus spinosulus Lyon 544 



Fig. la. Posterior view of the type specimen; from Louisville. (Lyon collection.) 

 lb. Dorsal aspect of the same specimen. 

 lc. Ventral aspect of same. 



2. A specimen from Columbus, 0. ; the form described by S. A. Miller as 

 M. pileatus. (Coll. W. and Sp.) 



Megistocrinus latus Hall 538 



3a. Ventral aspect of calyx. (Coll. A. S. Tiffany.) 



3b. Dorsal view of same. (The orientation of both figures incorrect.) 



Megistocrinus Farnsworthi White 539 



4a. Dorsal view of the calyx. (Coll. W. and Sp.) 



45. Side view of another specimen. (Same collection.) 



Megistocrinus concavus W. and Sp 543 



5a. Dorsal view of the calyx. (Coll. W. and Sp.) 



5b. Lateral view of the type specimen. (Davenport Acad. Sci.) 



5c. Ventral aspect of the same specimen. 



Megistocrinus rugosus Lyon and Cass 542 



6a. Dorsal aspect of the calyx. (Coll. W. and Sp.) 

 6b. Ventral aspect of the type specimen. (Lyon collection.) 

 6c. Anterior view of a smaller specimen, showing portion of the anal tube. 

 (Same collection.) 



