134 University of California Publications in Zoology [Vol. 23 



Type Locality. — Clarence Strait, Alaska, 322 fathoms ("Albatross" station 

 3077). 



Distribution. — From Iliuliuk Harbor, Unalaska, to off San Simeon Bay, Cali- 

 fornia, 50 to 559 fathoms (Eathbun). Off California this species is not known 

 to occur in less than 211 fathoms. 



Fig. 86. Pagurus ianneri, slightly reduced (U. S. N. M. ). 



Remarks. — This species is closely related to P. confragosus (Benedict, 1892, 

 p. 12), the present known range of which extends from the Bering Sea to off the 

 Columbia River, Oregon, but as Dr. Benedict remarks, ' ' The two species are 

 readily separated by the inner side of the raised triangle of the, large hand. In 

 this species [P. confragosus] it cuts off the inner depression of the upper surface 

 from the proximal margin of the palm, while in tanneri this depression is allowed 

 to reach the margin by a curvature of the ridge. ' ' 



