144 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



British Columbia: Mouth of Nass River and near Metlakatla, 

 D. C. G. MacKay (MacKay) ; Otter Bay, Pender Island, Seymour 

 Narrows, Albatross (Rathbun, 1925). Vancouver Island: Menzies Bay, 

 Discovery Passage, 6 fathoms, H. E. Nichols, and Victoria, C. F. New- 

 combe (Rathbun, 1893a) ; Comox and Clayoquot Sound (Newcombe) ; 

 Comox, W. Spreadborough (Rathbun, 1925) ; Nootka Sound (Hart) ; 

 Departure Bay, Alert Bay, Mayne Island, and Lowe Inlet (Taylor) ; 

 Sidney, 10-20 fathoms, G.M. Smith (G. M. Smith). Strait of Georgia, 

 J. K. Lord (Spence Bate) ; Bare Island, between Vancouver Island and 

 mainland, Schauinsland (Lenz). 



Washington: San Juan Islands: between Turn Island and San 

 Juan Island, Channel north of Brown Island, off Canoe Island, and 

 northeast of Brown Island, 6-55 fathoms (Way). Port Townsend, 

 U. S. Fish Commission (Rathbun, 1893a) ; off Squin Bay, 81 fathoms, 

 Kala Point, 14-17 fathoms, Admiralty Inlet, 16-31 fathoms, Albatross 

 (Rathbun, 1925). Puget Sound: Bashford Dean, Columbia University 

 Expedition (Caiman), Simeahmoo, C. B. R. Kennerly (Rathbun, 1925). 

 Atlantic analogue: None. A Pacific boreal species. 

 Diagnosis: Rostral horns moderately long and narrow. Exorbital 

 tooth and hepatic lobe joined in an alate projection having a concave 

 margin. Branchial row of tubercles well defined. Basal antennal article 

 with a large, rounded tubercle at anteroexternal angle. Cheliped of 

 adult male long, hand narrow. Male first pleopod with tip inclined, a 

 short row of five or six and a long row of 11 filaments on either side 

 of a line extended basally from subterminal aperture, which is closed 

 by a seta ; line of 1 1 filaments backed by two additional rows of filaments. 

 Description: Carapace lyrate and furnished with blunt tubercles. 

 Median region tumid, and generally furnished with two elevations, one 

 near the middle and one behind ; postmedian region prominent, pustulate 

 or roughened ; cardiac region furnished with a subcorneal elevation ; 

 branchial regions elevated at the middle and crossed by a more or less 

 evident line of rounded tubercles. Rostrum shorter than the width of 

 the interorbital space, the cleft between the horns narrow. A tooth on 

 the anterior margin of the optic peduncle. Basal antennal article with 

 a few small teeth on each margin and a prominent, smooth tubercle at 

 the anteroexternal angle; second [article] dilated and almost entirely 

 visible from above. A small tooth on the first [article] below the articula- 

 tion of the second. Maxillipeds granulated. Behind the eyes an alate 

 expansion, the anterior and posterior margins generally nearly parallel, 

 outer margin long and a little concave; anterior angle acute; a small 



