PLATE XXXI. 



Page 

 LOBOCKINUS NASHVILL.E (Troost) 435 



Fig. 1. Fiue specimen witli stein and anal tube. 



LoBocRiNus NASHVILL.1: var. subteactus (White) 436 



2a. Posterior side of a specimen with stem and anal tube. 

 2b. Portion of a deformed stem from another specimen. 



LoBOCEiNus PYEiFOEMis (Shumard) 437 



3a. Anterior view of the typical form ; part of stem and anal tube preserved. 

 3b. Posterior side of a varietal form. 

 3«. Anterior view of an elongate variety. 

 3d. Perfect specimen with stem, arms, and anal tube. 



3e. Section of an arm (enlarged), showing the spinous processes along the sides 

 of the free brachials. 



Batoceinus pistilltjs M. and W 378 



4a. Posterior view of the calyx. 



4i. Anterior view of another specimen. 



(All the specimens in the collection of Wachsmuth and Springer.) 



