PLATE XI 



Page 

 DiABOLOcRixus I'EKPLEXus W. aud Sp 250 



Fig. la. Dorsal view of a large calyx, showing very staall supplementary pieces 

 along the sides of the radials and between the interradials. 

 il/. Ventral aspect of the same. 



DiABOLOCRINrS VESPEEALIS "White 251 



1/". Lateral view of a specimen in which no supplementary pieces are developed. 

 Id. Lateral view of a specimen in which the primary interradials are completely 



separated from the radials by supplementary pieces. (All in Coll. W. 



and Sp.) 



Ehaphaxocrinus .subnodosus (Walcott) 259 



2. The type specimen. (IVIus. Comp. Zool.) 



Rhaphanocrinus sculptus (lliller) 2C0 



3. A specimen with arms. (Coll. I. H. Harris.) 



Ltriocrinus MELISSA (Hall) 263 



ill. A specimen with arms. (After Hall.) 



4^;. Dorsal aspect of a large specimen. (Coll. W. aud Sp.) 



4c. Ventral aspect, showing portion of the tegmen. (Coll. W. F. E. Gurle}'.) 



4(7. 'A smaller specimen, with the tegmen preserved, and showing the anus. 



(Coll. W. and Sp.) 

 4e. Lateral view of the calyx. (Coll. W. F. E. Gurley.) 

 4/. A young specimen with arms. (Coll. W. and Sp.) 



Lyriocrinus dactylus Hall 262 



5a and b. The types. (Amer. Mus. Nat. Hist., New York.) 

 5c. Specimen showing the pinnules, (:^^us. Comp. Zool.) 



Ehodocrinus Wortiiexi Hall 220 



6. A slightly crushed specimen with arms. (Mus. Comp. Zool.) 



KnoDocRiNrs nanus M. and W 228 



7a. The ty^ie specimen, lateral view ; from the Burlington Limestone. 

 lb. Ventral aspect of the same. (Mus. Comp. Zool.) 



