CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION II9 



194. GRAPSUS LONGIPES ' Stimpson 



Grapsus longipcs Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 102 [48], 

 1858. 



This species is closely allied to G. strigosiis, the carapax showing 

 nearly the same characters in every respect, except in being some- 

 what narrower anteriorly and a little more depressed across the 

 median region. In the proportions of the ambulatory feet, however, 

 considerable difference is perceptible, as they are much more slender 

 than in G. strigosiis, and more than twice the breadth of the carapax 

 in length. The dactyli are more spinulose than in G. longitarsis 

 Dana, the front more expanded, the gastric region less tuberculous, 

 and the teeth or spines at the inferior extremity of the meros of the 

 walking feet longer. The dimensions of a male specimen are as 

 follows: Length of carapax, 1.22; breadth, 1.34 inches. 



It was found at Kikaisima and at Hongkong. 



195. GRAPSUS SUBQUADRATUS= Stimpson 



Plate XVI, Fig. 4 



Grapsus suhqitadratiis Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 103 

 [49], 1858. 



Allied to G. strigosiis in the characters of the epistome, etc. Cara- 

 pax subquadrate ; length to breadth, as 1:1.13. It is broader in 

 front than in G. strigosuSj and the sides are less arcuated. The 

 transverse striae of the branchial regions are strongly marked, and 

 extend across nearly the whole width of the carapax, leaving only 

 the narrow depressed postcardiac region smooth, and even this por- 

 tion of the surface is obsoletely squamous. Pregastric region 

 strongly tuberculatcd. tubercles very numerous and subcristiform. 

 Frontal regic^n short and considerably tuberculatcd. Frontal margin 

 crenulated. Inner tooth of carpus spiniform, very long, slender, and 

 sharp. Ambulatory feet in length cfiualing just twice the width of 

 the carajjax ; spines at inferior extremity of meros rather strong; 

 dactyli longer than in G. strigosiis. Dimensions of carapax in the 

 male: Length, i.ii; breadth. 1.26 inches. 



It is allied to G. longitarsis in the character of the front and 

 dactyli, but the branchial strias are much more produced inward. 



It was found under stones below halt-tide mark on the ocean 

 shore at Hilo, Island of Hawaii. 



' Grapsits strigosus ( I Icrbst). 

 " Grapsus longitarsis Dana. 



