qqi CRUSTACEA. 



Subfamily I. GRAPSIN^]. 

 Genus PSEUDOGRAPSUS. 



The genus Pseudograpsus is very near Eriocheir of De Haan ; both 

 have the inner margins of the outer maxillipeds nearly parallel, 

 and the third joint round-cordate or subquadrate. But in the figures 

 of De Haan's Eriocheir Japonicus, the front is narrower than half the 

 breadth of the carapax, while in our Pseudograpsi, it is as wide as 

 half the carapax, or even wider ; and again, the form in the Eriocheir 

 is more polygonal, and the abdomen appears to be triangular from a 

 rather broad base, hardly narrower than the corresponding part of the 

 sternum and nearly twice as broad as the penult segment, while accord- 

 ing to Edwards, the Pseudograpsi have the abdomen narrower at base 

 than the sternum or but little broader than the penult segment, and the 

 carapax has arcuate sides. The Eriocheir Japonicus is a fresh-water 

 species, and the Pseudograpsi, as far as known, are sea-shore species. 

 The Eriocheir penicillatus of De Haan probably falls with the Pseudo- 

 grapsi : he does not mention whether it is marine or not. The genus 

 Utica of White, appears to be essentially congeneric with Eriocheir, 

 judging from the polygonal form and narrowness of the front in the 

 figure by White (Toy. Samarang, PL 13, f. G), although wanting in 

 the bushy hair of the hand. 



Pseudograpsus oregontnsis. 



Carapax puree areolatus, regions media/id lev iter circumscripta, cum 

 lined transversa antice levissime notatd, margine prcemediano abrupto ; 

 fronte siuuoso, margine antero-laterali bi-emarginato, dentibus acidis. 

 Pedes antici twves, maua extus nudd, infra obsolete^ uni-costatd, i,)dus 

 partim Janosd, carpo Iwvi, digitis maris hiantibus. Pedes postici mar- 

 ginibus paulo Jnrsuti ' prcecipue articulorum iti btique. 



Carapax sparingly areolate, median region faintly circumscribed, 

 crossed by a faint transverse line anteriorly, prcemedian margin 

 abrupt j front sinuous; antero-lateral margin bi-emarginate, teeth 



