THALASSINIDEA. 511 



Plate 32, fig. 1 a, animal, natural size ; b, profile view of carapax, 

 enlarged four diameters ; c, hand, enlarged two diameters ; d, caudal 

 extremity. 



Puget's Sound. C. Pickering. 



Length, two inches. The outer antennae have at base the appear- 

 ance of an appendicular scale, lying against the third basal joint ; the 

 form is narrow lanceolate, and its edge on both sides is long ciliate ; 

 but it appears to be only a part of the surface of the third joint, with- 

 out separate motion. The carpus is short triangular, and has a spine 

 at apex ; also, a row of short spinules near its lower margin. The 

 arm is not denticulate at the upper margin, which is naked, but has 

 an even row of delicate teeth on the lower margin. The outer sur- 

 face of the hand is convex ; and besides having a lanose line below 

 the middle, it has a line of distant short hairs above the middle, and 

 the hairs of the lower part of this surface conceal entirely the lower 

 finger in a view from the outer side. 



GEBIA HIRTIFRONS (White). 



Plate 32, fig. 2 a, animal, natural size; b, view of front, enlarged; 

 c, side view of carapax, enlarged ; d, hand ; e, caudal segment ; /, 

 appendages either side. 



Bay of Islands, New Zealand ; found along shores, burrowing, like 

 an Annelid, in the earth, among stones, near low water mark. 



Length, two inches nearly. Colour, pale reddish. Scabrous surface 

 of front part of carapax not reaching more than half way to dorsal 

 suture, and the points mostly in six nearly longitudinal lines. Hand 

 with the outer surface smooth, no spinules or denticulations, and few 

 hairs on the upper margin ; on lower margin, small denticulations, 

 and rather hairy ; lower finger slender and somewhat incurved ; cau- 

 dal segment not broader than long. Flagella of inner antennae a 

 little shorter than the last joint of base. Outer antennas about as 

 long as abdomen. A spine at lower apex of carpus. 



G. hirtifrons, A. WHITE, Ann. and Mag. Nat. Hist. [2], i. 225; Voy. Erebus and 

 Terror, pi. 3, f. 5. 



