PLATE LXVIII. 



Al.Ii 



Platycrixus verrucosus White 705 



Fig. In. The type specimen. (i\rus. Coiup. Zool.) 



lb. Oblique view of the dorsal cup. (Coll. W. and Sp.) 

 Ic. Another specimen ; dorsal aspect of the calyx. (Same collection.) 

 Id. Lateral aspect of a variety from New Mexico, showing tlie anal ojiening. 

 (Same collection.) 



Platycrinus pocilliformis Hall 7<'G 



2a. Lateral aspect of the dorsal cup (the ornamentation from another specimen). 



(Coll. W. and Sp.) 

 2b. Base of a specimen with larger nodes. (Coll. W. and Sp.) 



Platycrinus Yandelli 0. and Sh 70G 



3ff. Dorsal aspect of tlie calyx; a very mature specimen. (Same collection.) 

 3b. Ventral aspect of the same specimen. 

 3c. Posterior view of same. 



Platycrinus Yandelli, var. peeasper 708 



ill. Lateral view of a specimen with arms. (Mus. Comp. Zool.) 

 4:b. Dorsal aspect of the same specimen (the stem removed). 



Platycrinus sculptus Hall 091 



5. Specimen from New Mexico, lateral view of the calyx. (Coll. W. and Sp.) 



Platycrinus parvinodus Hall HOCi 



Gn. Side view of the type, the specimen somewhat flattened. (Mus. Comp. 



Zool.) 

 Gb. Anterior view of another specimen less distorted. (Coll. W. and Sp.) 



Platycrinus peculiaris W. and Sp TOO 



7a. Posterior vipw of the calyx ; the nodes partly eroded by weathering. (Coll. 



W. and Sp.) 

 71). Ventral aspect of the same specimen. 



Platycrinus geometricus W. and Sp 097 



8. Another type specimen. (Coll. W. and Sp.) 



