ECHINODERMA,. 
or 
Figure to illustrate the structure of a Starfish (Asterias rubens). 
In the ray marked I. the skin has been removed from the upper surface, and 
the ambulacral ossicles (wo) and the suckers (s) are seen in sifu; the 
blind outgrowths (¢) from the central stomach (sp) have been dissected 
out. In II. the gonads (g) are exposed ; and in V. the pouch-like diverti- 
culum (p) of the stomach is to be seen (where it joins the central stomach 
its roof has been removed to show the folded arrangement of its walls). 
The anus («) is seen to be subcentral in position. 
