DECAPODS 179 
Genus Telmessus White. 
TELMESSUS CHEIRAGONUS (Tilesius). 
Cancer cheiragonus TILESIUS, Mém. Acad. Impér. Sci. St. Pétersbourg, v, 347, 
pl. vil, fig. I, 1815. 
Telmessus cheiragonus BENEDICT, Proc. U. S. Nat. Mus., xv, 224, pls. XXv 
and XXVI, figs. 2, 3, and 4, 1892. 
Telemessus chetragonus 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 Zée/messus at Avacha 
Bay, Kamchatka, the type locality of Cancer cheiragonus Tilesius. These 
specimens are identical with 7. 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, 
Impér. Sci. St. Pétersbourg, vil, 180, 1848; Middendorff’s Sibirische 
Reise, Bd. 11, Theil 1, p. 83, 1851. 
Cheiragonus isenbeckii BRANDT, Middendorff’s Sibirische Reise, Bd. 11, Theil 
Wpsta7,. Lost. 
Platycorystes tsenbeckii RICHTERS, Abh. Senck. Natur. Gesell., Frankfurt, 
X11, Heft 4, p. 402, plate, figs. 1 and 2, 1884. 
Erimacrus tsenbeckii BENEDICT, Proc. U. S. Nat. Mus., XV, 229, pl. XXVI, 
figs. 5,6, and 7, pl. XXVII, 1892. 
Distribution.—Bering Sea, Aleutian Islands, and Alaska Peninsula. 
Shallow water to 85 fathoms. 
Family PORTUNIDZ. 
Genus Portunus Fabricius. 
PORTUNUS XANTUSII Stimpson. 
Distribution. —From Puget Sound to Chile (A. Milne Edwards). Ex- 
cept for a single specimen taken by the A/batross in Puget Sound, 
this species is not known north of San Pedro, California. 
