316 A. H. Clark. 



Group B. 



Group Characters. — Short cirri composed of 10 — 15 (rarely more) 

 Segments of which the distal are laterally compressed and recurved, and, 

 in lateral view, broader and shorter than the proximal; short and compa- 

 ratively stout arms, composed of short segments. 



Group Range. — Both coasts of the Atlantic, from Norway to the 

 Gulf of Guinea, and from the West Indies to Rio Janeiro. 



3. Antedon petasus (DübeD and Koreu). 



Range. — Norway, the Faroe Islands, the Shetlands and northern 

 Scotland, extending southward in deep water to the southern coasts of Eng- 

 land and Ireland; absent from the North Sea. 



4. Antedon bifida (Peunaat). 



Range. — Coasts of Ireland, southern Scotland and England (except 

 the North Seaj, the Channel Islands and southward to Cezimbra, Portugal, 



5. Antedon rnoroceana A. H. Clark. 



Range. — Corsica and Sicily westward along the northern coast of 

 Africa to Tangier, and southward to Senegal, including the Azores, Madeira, 

 and the Canary Islands. 



6. Antedon dühenli Böhlsche. 



Range. — St. Thomas, Danish West Indies, southward to Rio Janeiro, 

 Brazil. 



7. Antedon hupferi Hartlaiib. 



Range. — Gulf of Guinea, from Wapoo, Ivory Coast, eastward to Ilha 

 das Rolas, off the southern coast of Säo Thome. 



Well preserved speeimens of each of these species are very distinc- 

 tive, and are very easily distinguished from similarly well preserved speei- 

 mens of all the others when one has succeeded in mastering the various 

 difFerential characters; but unfortunately examples of all but two of them 

 are very rare in collections, and no museum contains a eomplete series, 

 though the Copenhagen museum collection includes all but one (A. hupferi). 



