PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued M?(Vyi,v)?Sf ^i/ '^« 



SMITHSONIAN INSTITUTION 



U, S. NATIONAL MUSEUM 



Vol. 83 Washington : 1936 No. 2982 



FIVE NEW GENERA AND TWO NEW SPECIES OF 

 UNSTALKED CRINOIDS 



By Austin H. Clark 



Curator, Division of Echinoderms, United States National Museum 



In revising the genera and species of the large comatulid family 

 Antedonidae, it was found that a more precise definition of certain 

 generic groups was desirable. This is made possible by the creation 

 of three additional genera the recognition of which will assist in bring- 

 ing out more clearly the true interrelationships of the species in the 

 groups concerned. In addition to these three genera there are de- 

 scribed herein a new genus based upon a hitherto undescribed species 

 from the northeastern Pacific and a genus that has long been used by 

 the author but never formally diagnosed. 



A small West Indian comatulid recorded from the Blake collection 

 by Dr. P. H. Carpenter as Antedon hagenii was for a long time a 

 mystery, as none of the specimens were received by Hartlaub when, 

 after Carpenter's death, the Blake collection was sent to him. This 

 now turns out to be a species quite dift'erent from Coccometra hagenii, 

 and it is described below as Compsometra nuttingi. It is assigned to 

 the genus Compsometra with some misgivings, but until more adequate 

 and more extensive material is available it seems better to place it 

 here than to create a new genus for it. 



46083—36 245 



