DECAPODS 179 



Genus Telmessus White. 

 TELMESSUS CHEIRAGONUS (Tilesius). 



Cancer cheiragonus TILESIUS, Mem. Acad. Imper. Sci. St. Petersbourg, v, 347, 



pi. VH, fig. i, 1815. 

 Telmessus cheiragonus BENEDICT, Proc. U. S. Nat. Mus., XV, 224, pis. XXV 



and xxvi, figs. 2, 3, and 4, 1892. 

 Telemessus cheiragonus HOLMES, Occas. Papers Calif. Acad. Sci., vii, 69, 1900, 



and synonymy. 



Harriman Expedition. Popof Island, Shumagins; Fox Island, Prince 

 William Sound (Kincaid). 



Distribution. Northeastern Siberia; Kamchatka; Kurile Islands; 

 Bering Sea to California (Holmes). Low water to 20 fathoms. 



Note on specimens from the type locality. Since the publication of Dr. 

 Benedict's ' Corystoid Crabs of the Genera Telmessus and Erimacrus,' 

 Dr. Leonhard Stejneger has collected specimens of Telmessus at Avacha 

 Bay, Kamchatka, the type locality of Cancer cheiragonus Tilesius. These 

 specimens are identical with T. cheiragonus, as figured by Benedict ; 

 otherwise the exaggerated lateral spines and the aculeate front of Tile- 

 sius's figure would lead one to suppose that his was a different species. 



Genus Erimacrus Benedict. 

 ERIMACRUS ISENBECKII (Brandt). 



Platycorystes (Podacanthus) isenbeckii BRANDT, Bull. Phys.-Math. Acad. 



Imper. Sci. St. Petersbourg, VII, 180, 1848; Middendorfl's Sibirische 



Reise, Bd. n, Theil i, p. 83, 1851. 

 Cheiragonus isenbeckii BRANDT, MiddendorfTs Sibirische Reise, Bd. II, Theil 



i, p. 147, 1851. 

 Platycorystes isenbeckii RlCHTERS, Abh. Senck. Natur. Gesell., Frankfurt, 



xin, Heft 4, p. 402, plate, figs, i and 2, 1884. 

 Erimacrus isenbeckii BENEDICT, Proc. U. S. Nat. Mus., xv, 229, pi. xxvi, 



figs- 5> 6, and 7, pi. xxvn, 1892. 



Distribution. Bering Sea, Aleutian Islands, and Alaska Peninsula. 

 Shallow water to 85 fathoms. 



Family PORTUNID&. 



Genus Portunus Fabricius. 



PORTUNUS XANTUSII Stimpson. 



Distribution. From Puget Sound to Chile (A. Milne Edwards). Ex- 

 cept for a single specimen taken by the Albatross in Puget Sound, 

 this species is not known north of San Pedro, California. 



