MONOGKArif OF JAPANESE OPHIUßOIDEA. 



355 



5 species : 2%. 



III. Bering species, wliicli range from the Bering Sea to Japan, 

 but not to the coast of U. S. A. The species belonging 

 here and their known southern h'mits are as follows. 



Species. 

 Ophioplithalmus cataleimmoidus : 

 Ophiacantlia adiaphora : 

 Ophiacantha rhachophora : 



Ophiacanthella acontophora : 

 Ophiosemnotes tylota : 

 Amphiodia cratewdometa : 

 Ophiura quadrispina : 

 Ophiura maculata : 



Southern limit, 

 off Mikawa, Yenshii Sea. 

 Sagami Sea. 

 Eastern Sea ; off Kii, Kumano 



Sea (on the Pacific side). 

 off Kurile Is. 



off Tsugaru, Sea of Japan, 

 off Korea, Sea of Japan, 

 off Shiribeshi, Sea of Japan, 

 off Abashiri, Kitami, Okhotsk 



Sea. 

 off Sado, Sea of Japan. 



Ophiopenia dlsacantha : 

 9 species : 4:%. 



IV. Intel' tropical species, which are widely distributed in both 

 the Indo-Pacific and Atlantic, but not in the Arctic or 

 Antarctic. The intertropical species usually occur in both 

 the East and West Indies. The species to be referred 

 here and their known northern limits in the North Pacific 

 are as follows. 



Species. 

 Asteronyx loveni^\' 

 Ophiolimna hairdi : 

 Ophiacantha pentagona^\' 

 Ophiacantha rosea : 

 Ophiactis savignyi^\' 



Northern limit. 

 Bering Sea. 

 Bering Sea. 

 Sagami Sea. 

 Sagami Sea. 

 Misaki districts. 



1) These species have been recorded also from East Indian waters. 



