'PLATE XXXVI. 



Pentacrinus decoeus, Wjy. Thorns. 



Diam. Page 

 Fig. 1. Calyx and arm-bases of a premature individual with large 



basals, . . . . . _ . x 4 336 



Fig. 2. The lower jjart of the stem of the same specimen, . . x 4 335 



Fig. 3. Calyx and arm-bases of another young individual with small 



basals, 



X 4 336 



