of the Pacific Shores of North America. 449 
DECAPODA BRACHYURA. 
Tring OXYRHYNCHA. 
CHIONECETES BEHRINGIANUS. Stimpson. 
Chioncecetes Behringianus, Stimpson ; Proc. Bost. Soc. Nat. Hist. vi. 84. 
Carapax with numerous scattered unequal rugose prom- 
inences which are blunt and wart-like about the middle, but 
become more acute anteriorly and at the sides. Superior 
surface covered with a short pubescence. The broad chan- 
nels above the postero-lateral margins are nearly smooth, 
but their double margins are granulated. The inferior an- 
tero-lateral margin is armed with about fourteen small bifid 
teeth which diminish in size forwards. The feet are every- 
where slightly pubescent, with the third articles scabrous or 
echinulate above ; those of the first pair are muricated along 
the angles, and everywhere somewhat scabrous on their 
upper surfaces. The abdomen in the male is one third the 
width of the sternal plastron at its penultimate article, the 
infero-lateral angles of which are somewhat produced and 
mid. Length of the carapax, 2.5; width, 2.52 inch. 
This species may be distinguished from C. opilio, Kroyer, 
Judging from the descriptions of that naturalist, by the 
shorter feet of the male —those of the second pair, in the 
species here described, being not more than twice the length 
of the carapax, while those of the first pair are not much more 
than half as long as those of the second. The abdomen 
Consists in both male and female of seven articles, the three 
nearest the base being strongly granulated. Kmovzm, in his 
diagnosis of the genus, states the number of articles to be 
Six, although O. Fasrictus * gives seven as the number in 
Cancer phalangium. 
It inhabits deep water, the specimens described being 
* m 
Fauna Gronlandica, p. 234 ; n. 214. 
JOURNAL B. S. N. H. 
