PART 1 GARTH : PACIFIC OXYRHYNCHA 145 



tooth near the base of the convex posterior margin. Behind the alate 

 expansion the side of the carapace quite deeply indented, the margin 

 furnished with a row of small tubercles. 



Merus of the chelipeds with a few small tubercles, more prominent 

 at the angles; hands narrow, compressed, smooth or granulated, the 

 upper margin compressed and roughened by small tubercles ; fingers 

 nearly smooth. 



Abdomen of the male widest at the second and third segments, the 

 sides nearly parallel to the last [segment] ; last segment distally truncated 

 and over twice as broad as long. Abdomen of the female broadly 

 elliptical, the [segments] increasing in length from the second to the 

 last. (Holmes, modified) 



Material examined: A total of 69 specimens from 15 stations, all 

 from British Columbia and the vicinity of San Juan Islands, Washing- 

 ton. (See Table 24) North of Alaska Peninsula, Bering Sea, 7.25 

 fathoms, June 2, 1890, Albatross station 3233, 1 male and 1 female 

 (U.S.N.M. No. 15906, part), determined by M. J. Rathbun. 



Measurements: Largest specimen, male: length 48.7 mm, width 

 36.8 mm, rostrum 6.8 mm, width 6.4 mm, cheliped 70 mm, chela 29 mm, 

 dactyl 15 mm, ambulatory legs 73, 70, 61, and 59 mm, respectively. 

 Female: length 44.6 mm, width 34.3 mm. 



Color in life: Carapace reddish gray; legs banded with stripes of 

 red and gray, not so noticeable in mature specimens. Red is present on 

 the legs of mature specimens, but does not extend to the tips except in 

 the chelipeds. Body much lighter on ventral surface. (Way) 



Habitat: Green mud; fine gray sand and broken shell; black sand 

 and gravel. (Rathbun, 1925) Often covered with hydroids, algae, and 

 barnacles. (Way) 



Depth: 5-350 fathoms. (Rathbun) Dredged by the Hydah in 11-62 

 fathoms. Occasionally found along shore at low tide in Alaska. (Johnson 

 and Snook) 



Size and sex: Males in the present series range from 10.5 to 45 mm, 

 females from 14.0 to 43 mm in length. None of the females are 

 ovigerous. Rathbun (1925) records a male measuring 105 by 80 mm. 



Breeding: An ovigerous female was encountered by the Albatross 

 at Yes Bay, Behm Canal, southeastern Alaska, and two ovigerous females 

 by Harold G. Coffin at Ship Harbor, Skagit County, Washington, 

 both in late August. 



Remarks: The statement by Stimpson (1857b) that the species in- 

 habits deep water off the coast of Oregon, unfortunately repeated by 



