1917 Way; on Taxonomy of Crabs 355 



acicles beset with little sjnirs similar to those on the eyestalks. Carapace 

 roughly triangular in shape; large elevations just posterior to the rostrum; 

 tubercles few, in groups ; 7 little groups of dark colored ones on points 

 at posterior angles; hairs few, stiff; cervical groove greatly de- 

 pressed, extending in curves towards posterior edge, forming an oblong 

 raised portion which looks much like the abdomen of a spider; margin 

 with 9 or 10 uneven spines and a fringe of hairs. Chelipeds stout, thick, 

 their hairs reddish with tan tips ; carpus with 1 long stout spine ; merus 

 with two stout spines close together but divergent distally ; dactyls hooked, 

 rough on inner margin. Walking legs covered with coarse spines and 

 bunches of hairs which are grouped about spines, hairy the whole length 

 even on the dactyls, color of the carapace grayish-tan with orange markings 

 in the depressions on the dorsal side, on the tubercles of posterior part 

 of carapace, and on abdomen and branchial region. Legs are not highly 

 colored but grayish tan like the general color of carapace. 



They prefer rocky and shell bottoms and have been found at depths 

 from 221/^ to 40 fathoms. One was reported by Perry (Puget Sound 

 Marine Station Pub. 1:175-176. 1916) in the summer of 1915 off Point 

 Caution (1) at a depth of 40 fathoms. Professor Kincaid has obtained 

 several specimens in Griffin Bay. Only one specimen was obtained during 

 the summer of 1916. It was secured off Canoe Island (16) in 30 fathoms 

 of water with much mud and algae. 



Genus Acantholithodes 



1. Acantholithodes hispidus (Stimpson) Holmes. (fig. 10) 



"Carapace flattened lyrate, covered with long setose spines, which 

 become somewhat larger towards the margins. Median region tumid and 

 separated from the cardiac by a very deep transverve sulcus ; a prominent 

 depression between the median and branchial regions. Rostrum quite large 

 and ending in three spines ; a large fourth spine above and behind the 

 median one. Eye peduncles hispid and retractile against the anterior mar- 

 gin of the carapace. Antennules large. Antennae shorter than the cara- 

 pace; first basal joint with a s})ine on either side; second joint produced 

 into a long acute process whose outer margin is armed with four or five 

 spines; acicle narrow, acuminate, armed externally with numerous spines 

 about equalling the lower spiny process. Ischium of the maxillipeds with 

 two small subconical teeth on the outer surface near the antero-internal 

 angle; merus his})id, not dilated, and longer than the ischium; last joint 

 of the palp flattened below. Chelipeds unequal, very spiny; 2 or 3 very 

 large spines on the anterior margin of the merus and carpus ; in the larger 

 hand the palm is inflated, the fingers deflexed, shorter than the palm, 

 excavated within, corneous tipped, are more extensive and furnished with 



