84 
The present one is branched, divaricated, compressed, 
truncated, covered all over with small prominent hollow 
tubercles, arranged towards the end in lines crossing each 
other obliquely, from which the animals protrude them- 
selves, so as to appear quite rough ; and some specimens 
-are covered with a shining, varnish-like appearance, as if 
the animals had dried when protruded from their little 
holes. 
