GRAPSOIDEA. 3g3 



Carapax (of female) subquadrate, rounded anteriorly, slightly broader 

 than long, naked, shining. Outer maxillipeds naked, very oblique. 

 Eyes very small. PosWrontal sutures nearly parallel, included area 

 oblong. Anterior feet of female rather slender, hand long, two 

 pubescent lines below, one reaching to extremity of finger ; eight 

 posterior feet rather slender, third joint partly pubescent above, 

 fifth, same below, tarsus short, half as long as fifth joint, uncinate. 



Plate 24, fig. 5 a, female, back view, natural size ; 6, same, under 

 view ; c, under view of front, enlarged nearly six diameters; d, hand, 

 enlarged five diameters ; e, extremity of leg. 



Puget's Sound. 



Length of carapax, five and three-fourths lines ; breadth, six and 

 three-fourths lines ; breadth between the post-frontal sutures, two and 

 one-fourth lines; length of third joint of fourth pair of legs, two and 

 three-fourths lines, or length about two-fifths of the breadth of the 

 carapax. Female abdomen very broad transverse elliptical. 



F. subquadrata, DANA, Proc. Acad. Nat. Sci. Philad., 1851, v. 253. 



FABIA CHILENSIS. 

 From an Echinus, on the coast of Chili, near Valparaiso. 



Pinnothera chilensis, EDWARDS, Crust., ii. 33 ; EDWARDS and LUCAS, Crust., D'Or- 

 bigny's S. A., 23, pi. 2, f. 2. 



GENUS XANTHASIA, White. 



The carapax in Xanthasia has an elevated margin, an elevated 

 quadrate area on the upper surface near middle, and two oblong eleva- 

 tions just posterior to the front. 



The species observed by the author has the habits of a Pinnothera, 

 and the depressed carapax of a Hymenosoma, although the body is 

 much thicker. The outer maxillipeds are like those of a Pinnothera. 

 The male abdomen is very narrow. 



Xanthasia, A. WHITE, Ann. and Mag. Nat. Hist., xviii. 176, Sept., 1846. 



