12 Crustacea and Echinodermata of the 



LOXORHYNCHUS GRANDIS. StimpSOTl. 

 Plate XIX. f. 1, and XXII. f. 1. 



Loxorhynchus grandis, Stimpson; Proc. Bost. Soc. Nat. Hist. vi. 85. 



Carapax pyriform, subglobose ; branchial regions broadly 

 expanded somewhat as in Libinia. Surface covered with 

 small warts of nearly uniform size, which are blunt and 

 rounded about the middle portion of the carapax, but be- 

 come sharp and spine-like anteriorly and on the sides, where 

 they are also more crowded. There are seven spines on 

 the hepatic protuberances, two of which are larger. Pubes- 

 cence very short and mostly obsolete above, leaving the sur- 

 face punctate with minute pit-like depressions. Rostrum a 

 little longer than wide, slit for somewhat more than half its 

 length, and greatly deflexed, pointing downward in a direc- 

 tion almost at right angles with the horizontal axis of the 

 body. The pru?orbital spine is emarginate at its extremity. 

 The feet are rather short and stout, covered with a short, 

 thick villosity. Those of the first pair shorter than those of 

 the second, with fingers touching each other along the whole 

 length of their denticulated inner edges ; wrist somewhat 

 tuberculous above ; third article with four small distant 

 spines on the superior margin, the largest being at the sum- 

 mit of the abrupt expansion at the articulation of the fourth 

 article. A single subterminal spine on the third article of 

 the second pair of feet ; this spine becomes almost obsolete 

 in the posterior pairs, which are elsewhere smooth. Tarsi 

 short and thick, somewhat curved, with corneous tips easily 

 separable in dry specimens. The color of exposed parts is 

 reddish inclining to roseate, becoming yellowish-white on 

 the sides. Fingers white. The following are the dimen- 

 sions of a female : — 



Length of carapax 5.55 inch. 



Width " " 4.54 " 



Length of rostrum from base of praeorbital spine . . 096 " 



