RESEARCH COLLECTIONS 65 



of possibly 175 species (of some 700 known), including more than 50 

 types. Of asteroids, we have 16000 specimens, representing nearly 600 

 of the 1200 known species, of which 175 are types. Of ophiurans, 

 there are more than 27000 specimens, of more than 800 species (of 

 1600 known), with more than 500 types. The collection of echini is 

 the most complete, with more than 45,000 specimens, of over 500 

 species (about 600 known), of which 225 or more are represented by 

 types. Of the approximately 1000 species of holothurians known we 

 have some 350, about one-third of which (120) are represented by 

 type material. 



