XXII.-LIST OF CRUSTACEA KNOWN TO OCCUR ON AND NEAR THE 



PRIBILOF ISLANDS 



By Mart J. RathbunJ 

 Second Assistant Curator, Division of Marine Invertebrates, U. S. National Museum. 



The Crustacea occurring at the Pribilof Islands are by no means restricted to 

 that archipelago. For example, of the Brachyura or true crabs, Hyas coarctatvs and 

 Chionoecetes opilio are circumpolar, while Oregonia gracilis and Hyas lyratus are very 

 common in the North Pacific. The hairy crabs or horse crabs, Telmessus and JErimacrus, 

 reach their fullest development in Bering Sea. The former, T. chciragomts, was first 

 recorded by Tilesius, the Eussian naturalist, from specimens collected by Steller at 

 Avacha Bay, Kamchatka, where it occurred in great abundance, and was used for 

 food by the sailors. Tt extends southward to Oregon. 



The three triangular anomuran crabs, Lithodes brevipes, Dermaturus mandtii and 

 Hapalogaster grehnitzlcii are distinctively Bering Sea species, inhabiting tbat body of 

 water and the Aleutian Islands. Nine si^ecies of North Pacific hermit crabs (Pagurtts) 

 are known to inhabit the shores of the Pribilofs. Most of these are of recent discov- 

 ery. Of the sixteen shrimps enumerated eight are circumpolar. 



It is to be exjiected tbat a more thorough study of the lower forms of Crustacea 

 will add many names to the list given below. 



Oregcnia gracilis Dana. 25 to 26 fathoms; U. S. Fish Commission. 



Hyas coarctatus Leacli. 20 to 62 fathoms; U. S. Fish Commission. 



Hyas lyratus Dana. 25 to 62 fathoms ; U. S. Fish Commission. 



Chionoecetes opilio (O. Fabricius). 20 to 65 fathoms ; U. S. Fish Commission. 



Telmessus cheiragonus (Tilesius). St. Paul Island; Palmer and Elliott. 



Erimacrus isenbeckii (Brandt). St. Paul Island; Palmer and Elliott. 29 to 41 fathoms; U. S. Fish 



Commission. 

 Lithodes brevipes Milne-Edwards. Young. St. Paul I.sland; Palmer and Elliott. 25 to 47 fathoms ; 



U. S. Fish Commission. 

 Dermaturus mandtii Brandt. 25 fathoms; U. S. Fish Commission. 

 Hapalogaster grebnitzkii Schalfeew. 25 fathoms; U. S. Fish Commission. 

 Pagurus alaskensis Benedict. St. Paul Island. 



Pagurus aleuticus Benedict. 56 to 65 fathoms ; U. S. Fish Commission. 

 Pagurus brandti Benedict. 65 fathoms; U. S. Fish Commission. 

 Pagurus confragosus Benedict. 57 to 65 fathoms ; U. S. Fish Commission. 

 Pagurus dalli Benedict. 26 fathoms; U. S. Fish Commission. 



' The lists of A.nomura and Isopoda were made from specimens determined by Dr. James E. 

 Benedict. 



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