of the Pacific Shores of North America. 465 
CHEIROGONUS HIPPOCARCINOIDES. Latreille. 
Cancer adsperso-setosus hippocarcinoides, STELLER, MS. (fide Tirestr.) 
Cancer cheiragonus, TrrEsrus ; Mem. de P Acad. Imp. des Sciences de St. Petersb. 
1815, v. 347, Pl. VII. f. 1. 
Cheiragonus hippocarcinoides, LATREILLE; Fam. Nat. 1825, p. 270. (fide 
Branpriz.) 
Platycorystes ambiguus, Branpt; Bulletin physico-mathém. de (Acad. de St. 
Petersb. 1849, vii. 179. ; ; 
Platycorystes cheiragonus, Brann; in Middendorff’s Sibirische Reise, zs She 
Cheiragonus hippocarcinoid , Branpt; in Midd. Sibirische Reise, Zodl. i. 147. 
Telmessus serratus, DANA ; U.S. Exploring Expedition, Crust. i. 303, Pl. XVII. 
f. 8, (vix Wurrz.) 
This crab may be distinguished among those of this coast 
by its scabrous and setose surface, and the large triangular 
lateral teeth, of which there are four on the antero-lateral 
and two on the postero-lateral margin. These teeth have 
Serrated margins, and the outer one on each side is much 
the largest. The inter-antennary front, which is separated 
om the preorbital tooth on either side by a broad sinus, 
has four small equal teeth. Length about two inches. It 
Was found on the coast of Upper California by Dr. Le 
Conte ; in Puget Sound by the Exploring Expedition ; and 
at Sitka by Wosnessenski. 
Mus. Acad. Petrop.; Expl Exped.; Phil. Acad. 
CHEIROGONUS ISENBECKII. Brandt. 
Platycorystes Isenbeckii, Branpt ; Bulletin physico-mathém. de UV Acad. de St. 
Petersh: 1849, vii. 179 
i wi - ; Li 147 
Cheiragonus Isenbeckii, Bnaxpr; in Middendorff’s Sibirische Reise, Zodl. i. 
Unalaschka, ( Wosnessenski.) 
us. Acad. Petrop. : Lave 
his very distinct genus, to which so many ch id 
recently been applied, is now known to include at leas 
Species. That found on the west coast of North Amer- 
ica, which occurs also along the shores of the Ale gn 
Islands, of Kamtschatka, and the Sea of Ochotsk, is dis- 
JOURNAL B. s, N. H. 60 
