DECAPODS 109 
the second joint; second joint about one and a half times as long as the 
third; inner flagellum about one fourth longer than the carapace; outer 
flagellum about two thirds the length of the inner 
and becoming much smaller at the middle, the distal 
half very slender. 
Antenne with a strong spine below the base of 
the acicle; peduncle slightly exceeding that of the 
antenna; scale with a broad terminal spine, which 
reaches the end of the antennular peduncle, and ex- 
ceeds the blade, from which it is separated by a short | =} <3 |S ¢ 
narrow slit; flagellum nearly twice the length of the | 
cos F : ‘ IG. 49. Beteus har- 
carapace. Maxillipeds reaching a little past the mid- vimanz.\" a. Dorsal view 
of anterior portion (x 4). 
dle of the terminal segment of the antennal peduncle. 4. Carpus and chela of sec- 
. aa ond pair (X 53). c. Left 
Chelipeds subequal, similar, of very moderate size; chela of first pair (x 22). 
merus with rounded angles, the distal end widened, length about two and 
a half times breadth, outer surface with a broad oblique sulcus, a trans- 
verse groove at the supero-distal angle, behind which the upper margin 
ends abruptly, but does not terminate in a spine; surface granulate, 
lower surface granulo-spinulous. Carpus small, rounded. Hand narrow- 
oblong, somewhat compressed, finely scabrous, margins rounded, the 
length not more than one half greater than that of the preceding joints 
combined. Fingers fitting close together, the pollex narrowly conical 
and twice as wide at base as the dactylus, which is subcylindrical; the 
tips are sharp and cross each other; the prehensile edges are subentire, 
very finely denticulate, that of the pollex convex except at the tip. 
The first joint of the carpus of the second pair of feet is about as long 
as the three following combined; the third and fourth are equal, the 
second a little longer than either; the fifth twice as long as the fourth, 
and slightly shorter than the palm, which is subequal to the fingers. 
The propodi of the remaining feet have a row of six or seven spines 
beneath; the dactyli are over a third the length of the propodi and very 
acuminate. 
The postero-lateral angles of the fourth and fifth abdominal segments 
are rounded, of the sixth blunt. The distal end of the peduncle of the 
uropods bears a pair of spines; a spine near the outer angle of the 
uropods. 
Color.—Light green. 
Dimensions.—Female, length of body to tip of telson 26.6 mm.; 
length of carapace 10 mm.; length of cheliped 17.5 mm.; length of palm 
6 mm.; of dactyl 4.6 mm. 
Dype locality.—Sitka (W. R. Coe, Harriman Expedition); one female 

