PLATE LVIII. 



Page 



Cacxockixus clarus (Hall) 612 



Fig. 1. Showing tlie arm structure, and the arrangement of the hooks along the 

 pinnules. 



Cactocrinus reticulatus (Hall) 605 



2a. Anterior view of the calyx. 

 2b. Posterior view of the calyx. 



Cactoceixus proboscidalis (Hall) COl 



3. A large specimen with arms. 



4. Another specimen with arms. 



5. Posterior view of the calyx. 



6. Lateral view of a specimen, showing a portion of the anal tube. 



7a. Portion of an arm, showing the dorsal side of the pinnules and the hooks ; 

 the food grooves open at places, and closed at others, f . 



7b. The ventral side of the pinnules still more enlarged, showing the arrange- 

 ment of the covering plates and side pieces, and also at intervals the 

 bottom of the food grooves. 



7c. Dorsal aspect of three adjoining pinnules greatly enlarged. 



7d. A single pinnule joint, greatly enlarged. 



Cactocrinus multibrachiatus (Hall) 617 



8. Anterior side of a fine specimen with arms. 



Cactocrinus limabrachiatus (Hall) 608 



9. Lateral view of the calyx (one of the rays abnormal, having but one costal). 

 lOrt. Specimen with arms. 



106. Arm joints, much enlarged. 



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



