PLATE LX. 



PAGE 



Aulocalyx irregularis, F. E. S., . . . 174 



Fig. 1 . Basal part of a partially macerated specimen ; natural size. 

 Fig. 2. Macerated skeleton of a lateral tube ; natural size. 

 Fig. 3. Transverse section of the wall (combination figure) ; x 50. 

 Figs. 4, 6. Discohexasters ; x 300. 

 Fig. 5. Large hcxaster with long clavate and barbed terminal rays ; x 300. 



