12 BULLETIN 82, UNITED STATES NATIONAL MTJSECJM 



The revision of the old genus Antedon had not proved entirely satisf actory ; in 

 particular, the genus Antedon as there restricted was too heterogeneous, and on April 

 11, 1908, a paper was published in which 12 additional genera were proposed. These 

 new genera, of which the geographical and bathymetrical ranges as well as the colors 

 were given, were the following : 



Oligometra (genotype Antedon serripinna P. H. Carpenter, 1881) including 



Oligometra adeonae. Oligometra japonica. 



Oligometra bidens. Oligometra pinniformis. 



Oligometra caribbea. Oligometra serripinna. 



Oligometra carpenteri. 



Erythrometra (genotype Antedon ruber A. H. Clark, 1907) including 



Erythrometra ruber. 



Thaumatometra (genotype Antedon ciliata A. H. Clark, 1907 [ = Antedon tennis 

 A. H. Clark, 1907]) including 



Thaumatometra abyssorum. Thaumatometra isis. 



Thaumatometra alternata. Thaumatometra laevis. 



Thaumatometra comaster. Thaumatometra longipinna. 



Thaumatometra exigua. Thaumatometra parva. 



Thaumatometra hirsuta. Thaumatometra parvula. 



Thaumatometra remota. 



Coccometra (genotype Comatula hagenii Pourtales, 1869) including 



Coccometra hagenii. 



Coccometra nigrolineata ( = Antedon hagenii of H. L. Clark [not hagenii Pour- 

 tales], 1901). 



Leptometra (genotype Alecto phalangium J. Miiller, 1841) including 



Leptometra celtica. Leptometra phalangium. 



Hathrometra (genotype Alectro dentata Say, 1825) including 



Hathrometra dentata. Hathrometra sarsii. 



Hathrometra prolixa. Hathrometra tenella. 



Iridometra (genotype Antedon adrestine A. H. Clark, 1907) including 



Iridometra adrestine. Iridometra minuta. 



Iridometra briseis. Iridometra nana. 



Iridometra crispa. Iridometra parvicirra. 



Iridometra psyche. 



Compsometra (genotype Antedon loveni Bell, 1882 [ = A. pumila Bell, 1884]) 

 including 



Compsometra loveni. Compsometra serrata. 



Trichometra (genotype Antedon aspera A. H. Clark, 1908) including 



Trichometra aspera. Trichometra vexator. 



