169 



Radsiella (4), Califoruia, Tierra del Fuego, Cape of Good Hope. 



Ischnoradsia (6), Australia, Japan, California, Sitka, British 

 Columbia. 



Heterozona (2), Australia, New Caledonia. 

 Callistochiton (19), Florida, Chili to California, Rio Janeiro, Japan, 



Indo-Malayan Archipelago, Australia, Red Sea. 

 JVuttallina . 



Nuttallina (4), California, Chili, Japan. 



Middendorjia (2), Mediterranean, West-Europe, Azores. 

 Nuttallochiton (1), Straits of Magellan, Tierra del Fuego. 

 Craspedochiton (2), Fhilippines, Indo-Malayan Archipelago, Ceylon. 

 Phacellozona (= Angasia) (1), Ceylon, Maldive and Laccadive 



Archipelagoes, Philippines, 

 Callistoplax (1), China (?), Central America. 

 Ceratozona (2), Florida, West India, Central America. 



Fam. Mopaliidae. 



Mopalia (7), California, Aleutian Islands. 



Placiphorella (5), California, Behring sea, Japan, Celebes, Peru. 



Plaxiphora and Placophoropsis (16 ')), Eastcoast of North America, 

 South America, Valparaiso , Tristan da Cunha, Cape of 

 Good Hope, Mozambique, Australia, New Zealand. 



Sguamophora (1), Indo-Malayan Archipelago. 



Fam. Acantliochitidae. 



Spongiochiton (1), New Zealand. 



Leptoplax (2), Philippines, Indo-Malayan Archipelago. 



Acanthochites. 



Aeanthochites s. str. (35 ^)), Cosmopolitan. 

 Notoplax — including Acanthochites crocodilus and cornutus 

 Torr & Ashby — (15), Australia, New Zealand, Indo-Malayan 

 Archipelago, East and South Africa, Florida. 



1) Including Plaxiphora parva nov. spec. from Mozambique, the description of 

 which will appear in the nes part ot' the „Zoologische .Tahrbücher". 



2) Including Acanthochites variegatns nov. spec. from South Africa. See note 1). 



