THREE CRUISES OF THE “BLAKE.” 
100 
deep-water spatangoids is Hemiaster (Figs. 369, 370), a small 
globular genus representing the earlier forms of spatangoids 
Fig. 369. — Hemiaster zonatus. 1. Fig. 370. — Hemiaster expergitus. 3, (Lovén.) 
characterized by a simple fasciole. Others belonging to the dis- 
tinedy cretaceous family of Ananchytide are the huge violet or 
Fig. 371. — Paleopneustes hystrix. 2. 
deep claret-colored * Paleopneustes, characterized by their emi- 
nently spatangoid mouth, by 
their simple ambulacral system 
and somewhat elypeastroid or 
even echinidal spines, as in 
Paleopneustes hystriz (Fig. 
371), in which the spines re- 
semble more those of a true 
than a spatangoid. 
Other typical modern Ananchytide are the West Indian Palæo- 
brissus and Paleeotropus. (Fig. 372.) 
1 The colors of the deep-sea echini alcohol in which they were placed. The 
and other echinoderms seem to be spe- color of the littoral or shallow-water spe- 
cially fugitive, and greatly discolored the cies is far more permanent. 
Fig. 372. — Palwotropus Josephine. 2. " 
= r gi : Echinus 
