PLATE 33. 
Page. 
Fic. 1. AMPLEXUS ZAPHRENTIFORMIS.... .---- a en US UL Ft eT) 
a. Lateral view of the largest discovered example; natural size. 
b. Similar view of a smaller broken example. 
c. Calyx of another exaryple. 
d. Section, showing tabule. 
MiG. 2. VARCHEOCIDARIS) CRATIS) pope ceeieee ee eee eee eee eee ee Bees Ora eeme Ne eV AERO) 
a, Lateral view of one of the principal spines; natural size. 
IG sony DOD YC LUA TRDAING WI ACD SU sees tree ayaa rel ayesha a a en eae kt 
a. A group of fragments; natural size; from Northwestern Colorado. 
b. One of the type specimens of the species; from Danville, IL; 
natural size. 
Transverse section of the same. 
View of one side of the same; much enlarged. 
. Diagram of 3 ¢; enlarged; showing the manner of radiation of the 
celis from the tripartite axis. 
Rs 
Pig. 4. RAYNCHONELLA. ENDLICHE 22 ilo ies selon cine eine eee es eee 133 
a. Dorsal view of a natural cast of a large example; natural size. 
6. View of an imperfect ventral valve. 
For other figures of this species see plate 36. 
Fic. 5. ERISOCRINUS TYPUS..-.....-- EBON SESS AN EE U7 aay a Nleraa| L, P eE Cp 
a. Side view ; natural size; showing a portion of the stem and arms. 
FIG. 6. POTERIOCRINUS MONTANAENSIS ...--.------ -2---- coe eee oon ence eee 128 
a. View of anal side of Mr. Meek’s type specimen; natural size. 
PIGS 75 SREATYCRINUS* HAYDEN SiG Yass ae ie area eg eee pen Ea a 22 
a. Side view of Mr. Meek’s type specimen; natural size. 
Wig. 8. EUPACHYCRINUS PLATYBASIS....---- s2. 0-0 ecees cannes cee ea AV ea Riya 124 
a. Basal view; natural size. 
FIG 295) AT LORISNAG GILBERT meses ce eee ee SS TS Ae eta LS Ga 
a. Right side view; natural size. 
b. Dorsal view of the same. 
