CLARK: DISTRIBUTION OF UNSTALKED CRINOIDS 217 



The frequency ai different temperatures of the comatulids occurring on the coasts 



of China and Japan 



Southern Japanese division of the Indo-Pacific fauna, and proba- 

 bly reached the Sea of Japan through the Korean Straits. 



In the foregoing Hsts are included all the comatulids known 

 from Chinese and Japanese waters, with their bathymetric and 

 thermal ranges. The fauna to which each belongs is indicated 

 as follows: M., Malayan; Arc, Arctic; Aiit., Antarctic; those 

 not especially marked belong to the Southern Japanese division 

 of the Indo-Pacific fauna. 



In the diagram (fig. 1) on which are shown the bathymetric 

 ranges of the species of the different faunal units which collec- 

 tively constitute the comatulid population of the Chinese and 



