14 HiCKSON, Specijucii of Ostcocella septentrionalis {Gray). 



The genus shows a great development of fleshy tissue 

 on the ventral side of the ventral longitudinal canal. This 

 tissue is perforated by well marked radial canals. Sexual 

 organs situated in the ccelenteric canals of the autozooids 

 in the rachis but not in the pinna;. They are found in 

 this position throughout the whole length of the rachis. 



The best figures and description hitherto published 

 are by Moss (II). 



