MONOGEAPH OF JAPANESE 0PHIÜR01DEA. 93 



Ophiocimbium Lyman, 1880. 

 Ophiologimus Clark, 19.11. 

 Amphipsila Veerill, 1899. 

 Ophiophrura Clark, 1911. , 



Ophiotoma Lyäian, 1883. ; 



Ophiohlenna Lütken, 1859. 



III. Disk beset with grannies or spines ; radial shields small 

 or rudimentary. 



Opliiopora Verrill, 1899.'^ 

 Ophiotrema Kœhler, 1907.*^ 

 Ophiamhix Lyman, 1880.^^ 

 Ophiomedea Kœhler, 1906, 

 Ophiopristis Verrill, 1899. 

 Ophioprium Clark, 1915. 



B. Tentacle pores smaU and inconspicaons. 



IV. Radial shields small, short. 



Mlcrophlura Mortensen, 1910. 

 Ophiolimna Verrill, 1899. 

 Ophiomitrella Verrill, 1899. 

 Ophîophthalmus, nov. 

 Ophientrema Verrill, 1899. 

 Ophioscalus Verrill, 1899. 

 Ophiocopa Lyman, 1893. 

 Ophiochondrella Verrill, 1899. 

 Ophiosemnotes, nov. 



1) These genera have been stated by Clark, 1915, to be congeneric with Ophiotoma, notwith- 

 standing that they differ from it in the covering of the disk. It is of course true that these three 

 genera resemble one another in the large tentacle jiores. But this character is also common to 

 all the genera belonging to the group A. So that I am obliged to disagree with him. 



2) This genus is very doubtful in position. I provisionally refer it here, merely because 

 the tentacle pores and scales remind us of those of Ophiophrura and Ophiotrema. 



