122 RATHBUN 



Dimensions. Length of female 70.6 mm., of carapace 18.9 mm., of 

 antennal scale 13 mm. Length of hand of male 9.5 mm., width 1.8 mm. 

 Length of hand of male of C. franciscorum n mm., width 2.6 mm. 



Type locality. Off Chuck-a-nuts Island, Bellingham Bay, Washington, 

 ii fathoms (Albatross station 3612). 



Distribution. British Columbia to Oregon as follows: 

 Gulf of Georgia, British Columbia, 67 fathoms (Albatross station 2863). 

 Washington Sound, Strait of Fuca, 48 fathoms (Albatross station 2864). 

 Strait of Fuca, 53-67 fathoms (Albatross stations 3460, 3597). 

 Admiralty Inlet, Puget Sound, 40 fathoms (Albatross station 2865). 

 Seattle, Washington, taken at the surface by electric light (Albatross}. 

 Off Columbia River, 27 fathoms (Albatross station 3065). 

 Astoria, Oregon (Aug. C. Kinney). 

 Off Tillamook Rock, Oregon, 23-28 fathoms (Albatross stations 3060, 



3061). 



It will be noticed that the two forms meet off the coast of Oregon, 

 where the differences are less sharply drawn. 



CRANGON INTERMEDIA Stimpson. 



Crangon intermedia STIMPSON, Proc. Acad. Nat. Sci. Phila., xii, 25 [94 of 

 separate], 1860. In Bering Sea near Cape Chepoonski, 40 fathoms. 



Crangon tenuifrons KINGSLEY, Bull. Essex Inst., xiv, 128, pi. I, fig. 10, 

 1882. Marmot Island, Kadiak. 



Carapace about two fifths as long as the abdomen ; furnished with a me- 

 dian carina having 2 spines, a stout one about half way between the orbit 

 and the posterior margin, and a smaller one a little behind the rostrum. 

 Rostrum convex in profile, having a longitudinal sulcus and a rounded tip. 



On the anterior margin there is a blunt spine at the outer angle of the 

 orbit and a sharp spine at the antero-lateral angle. On a line with the 

 orbital spine there is a smooth carina; below the carina a sharp spine 

 well forward and terminating a short carina ; higher up a flattened blunt 

 spine or tubercle, situated about half way between the two median spines. 



The antennal scale is short and broad, about half as long as the cara- 

 pace ; the spine scarcely exceeds the blade. The outer maxillipeds ex- 

 ceed the antennal scale by half the length, or more, of their terminal 

 segment. The first pair of feet overreach the scale slightly; the merus 

 has a short spine at the middle of its inner margin ; the manus is about 

 three times as long as wide ; the pollex arises at about the distal third ; 

 the dactylus when flexed is slightly more longitudinal than transverse. 

 The sternum has a lobate median crest, which in the male has a tendency 

 to become spiniform. 



The first five segments of the abdomen are distinctly carinated ; the 

 sixth segment has two prominent carinas. 



