168 



Ischnochiton. 



Stenochiton (3), Australia. 



Stenoplax — including Stenoradsia and Ischnochiton sarcosus 

 Dall — (10), California, East- and Westcoast of Central 

 America, Martinique, Peru, Ceylon, Philippines, Indo- 

 Malayan Archipelago. 

 Ischnoplax (1), West India. 

 Haploplax (5), Australia. 

 Ischnochiton s. str. 



longicymba-grouTp (16), Australia, Japan, Chili. 



te.vtilis- grouT^ — including Ischnochiton elizabethensis Pils- 



bry — (6), South Africa. 



Wssoz-group (5), South Africa, Mediterranean, West India, 



Cape Verde Archipelago. 

 striolatus-^YOUi^ — including Ischnochiton ptychius Pils- 

 bry — (9), Antilies, Panama, Australia. 

 interstinctus-gron^ (3), California. 

 comp^us-group (5), China, Japan, Sandwich Islands, 



Indo-Malayan Archipelago. 

 punctulatissimiis-groMTp (6), Florida to Peru and Pata- 

 gonia, Golf of Mexico, South Africa, Indo-Malayan 

 Archipelago. 

 scabricostatus-grou]) — including Ischnochiton ferreus 

 Sykes — (8), California, Ceylon. 

 reteporo^us-gro\x\) (1), Puget Sound. 

 aspidaulax-groMT^ (1), Panamic region. 

 vaWaws-group (1), Chili. 

 hergoti-gxowp (2), Island St. Paul. 

 With respect to Ischnochiton feliduensis E. A. Smith, maldi- 

 vensis E. A. Smith, hululensis E. A. Smith, wilsoni Sykes, tateanus 

 Bedn., pilshryi Bedu., thomasi Bedn,, parkeri Suter and biarcuatus 

 Dall I ara uncertain where to place these forms. 



Lepidozona (18), Sitka, California, South Pacific, Australia, 

 New Ireland, Philippines, China, Japan, Corea, Cape Verd 

 Islands, St. Vincent, Portugal, Prince Edward Island. 



