ASTEROIDEA i93 



Subgenus Retaster Perrier (including Hexaster, Temnaster) 



Pteraster, in which the oral web is continuous across the point of the jaw so that all the 

 marginal spines of an oral angle are united by one continuous membrane. Occasionally 

 the small, outermost, spine may be free, or partly so. 



Pteraster capensis Gray, type species by designation (Fisher, 1919, p. 460). South Africa. 



Pteraster gibber (Sladen). Magellanic region. 



Pteraster tesselatus Ives. West coast of North America from Strait of Fuca to Bermg Sea. 



Pteraster tesselatus arcuatus Fisher. Monterey Bay, Cahfornia. 



Pteraster piilvilhis Sars. North Atlantic, Arctic Ocean, Bering Sea. 



Pteraster imdtiporiis Clark. Japan. 



Pteraster corynetes Fisher. Molucca Passage. 



Pteraster temnochiton Fisher. Aleutian Islands. 



Pteraster obscurus (Perrier). Arctic Ocean, North Atlantic, Bering Sea. 



Subgenus Apterodon nov. 

 Pteraster, in which the marginal mouth spines are not united by a web. 



Pteraster stellifer Sladen, type species. Antarctic, circumpolar, north to Falkland Plateau. 



Pteraster danae VerriU. Atlantic Ocean off coast of South America. Perhaps this and stellifer 



are races of the same species. 



Pteraster coscinopeplus Fisher. California. 



Pteraster reticulatus Fisher. Hawaiian Islands. 



Pteraster fornicatus Mortensen. South Africa. 



Pteraster obesus Clark. Japan. 



Pteraster obesus myonotiis Fisher. Philippine Islands. 



Pteraster tetracanthus Clark. Victoria, Australia. 



Pteraster carribaeiis Perrier. Lesser Antilles. 



The use of Retaster for a subgenus of Pteraster is necessitated by the fact that I made 

 capensis the type species because Perrier placed it first, and since his description of 

 Gray's capensis indicates a typical Retaster in the old sense. Several years later Clark 

 (1923) and Mortensen (1933) found that capensis is not congeneric with cribrosus nor 

 insignis. See below, under Pteraster gibber. 



Pteraster florifer Koehler, 64° 34' S, 127° 18' E, 1700 fathoms, is not included in any 

 of the above lists since the damaged type specimen lacks mouth-plates. I surmise that 

 the species will uhimately fall in Pteraster s.s. 



Pteraster ingouffi Perrier, in my opinion, is a synonym of Diphpteraster verrucosus; 

 Pteraster hunteri Koehler, a synonym of stellifer Sladen, which may possibly later be 

 merged with danae VerriU. Pt. multispinus Clark and Pt. gracilis Clark are probably 

 synonyms of Pt. tesselatus along with Pt. hebes VerriU. Pt. aporiis Ludwig is a synonym 

 of Pt. militaris. Pt. obscurus includes Pt. hexactis and Pt. octaster VerriU. 



