PLATE IX. 



Page 

 Reteocrinus Onealli (Hall) 179 



Fig. la. Anterior view of a specimen with arms (f). (Coll. I. H. Harris.) 

 lb. Posterior view of another specimen with arms. (Coll. W. and Sp.) 

 lc. Lateral view, showing ventral disk. (Same collection.) 

 Id. A portion of the ventral disk enlarged. (Same collection.) 

 le. Inner floor of the calyx, showing the small supplementary plates which 



surround the primary interbrachials (f). (Same collection.) 

 If. The type of " Glyptocrinus cognatus." (After Miller.) 



Reteocrinus magnificus S. A. Miller 181 



2. Side view of a specimen with arms and portions of stem. (Col. I. H. Harris.) 



Reteocrinus stellaris Billings 178 



3«. One of the type specimens, posterior view. (Museum Geol. Surv., Canada.) 



3b. Anterior view of another type specimen. (Same collection.) 



3c. Part of the calyx, showing the fixed brachials. (Same collection.) 



Reteocrinus eimbriatus Billings 179 



4. The type specimen in a lateral view. (Museum Geol. Surv., Canada.) 



Xenocrinus Baeri (Meek) 185 



5a. Posterior view of a specimen with arms. (Coll. I. H. Harris.) 



5b. Lateral view of another specimen with arms. (Coll. W. and Sp.) 



5c. Inner floor of calyx (^). (Coll. I. H. Harris.) 



5d. Section of an arm, greatly enlarged. 



Xenocrinus penicillus S. A. Miller 183 



6a. Lateral view of one of the types (f). (Same collection.) 



&b. Posterior view of another type specimen (f). (Same collection.) 



Tanaocrinus typus W. and Sp . 186 



la. Posterior view of a type specimen (f). (Coll. W. and Sp.) 



lb. Anterior view of another type specimen (f). (Same collection.) 



lc. The stem, enlarged. 



