PLATE XXVII. 



Page 

 Batocrixus gkaxdis (Lyon) 381 



Fig. la. Lyon's type specimen, — a fine example witli arms 

 lb. Portion of an arm from near the top, enlarged. 

 2a. Lateral view of the calyx. 

 2h. Posterior view of a specimen with anal tube. 



Batoceinus icosidactylus Casseday 368 



3«. Lateral view of a large specimen. 

 3b. Dorsal aspect of another specimen. 

 3c. Portion of the anal tube. 



Batocrixis irregularis Casseday 369 



4a. Posterior view of the calyx, somewhat enlarged. 

 4i. Lateral view of the same specimen. 

 4c. Portion of the anal tube. 



Batocrixus turbixatus (Hall) 375 



5a. Posterior view of the calyx. 



5b. Lateral view of another specimen. 



5c. Antero-lateral view of a specimen witli arms. 



Batocrixus turbixatus, var. elegaxs (Hall) 376 



6«. Lateral view of the calyx. 

 6b. Posterior view of the same. 



Batocrixus caxtoxexsis Miller and Gurley 383 



7n. Posterior view of a specimen, showing anal tube. 

 7b. The same view of a specimen with arms. 



Batocrixus cltpeatus (Hall) 380 



Sia. Lateral view of the calyx. 



8b. The same of another specimen (variety B. linpillntns). 



8c. Anterior view of a more wheel-shaped specimen. 



M. Posterior view of a young specimen (typical form). 



8('. Lateral view of a small specimen with arms (variety B. inornatus.') 



(.\11 the specimens are in the collection of Wachsmuth and Springer, except 

 that of Fig. la, which is in the Lyon collection.) 



