234 University of California Publications in Zoology [Vol. 23 



specimen of 23 mm. in width. The deeper stations, D 5702, off Sausa- 

 lito, D 5742 in the upper end of Raccoon Strait, and D 5785, on the 

 fishing grounds, were made on rocky, shelly, on clean dark gray sand 

 with a few fragments of stone and occasional, small compact masses 

 of black mud, and on "fine dark green sand" bottoms respectively. 



The temperatures at which this species was taken range from 8.8° 

 to 15.9° C; while in no case was any specimen taken in water of a 

 salinity less than 21.3. 



Cancer oregonensis (Dana) 



Plate 36, figures 3 and 4 



Trichocera oregonensis Dana, Proe. Acad. Nat. Sci. Phila., 6, 86, 1852; 



Crust. IT. S. Expl. Exped., 1, 299, 1852, pi. 18, fig. 5, 1855. 

 Tricliocarcinus oregonensis Holmes, Occas. Papers Calif. Acad. Sci., 7, 54, 



1900. 

 Tricliocarcinus walJceri Holmes, Occas. Papers Calif. Acad. Sci., 7, 53, 1900. 

 Cancer oregonensis Eathbun, H. A. E., 10, 178, pi. 7, fig. 1, 1904; Wey- 

 mouth, Stanford Univ. Publ., Univ. Ser., no. 4, 49, pi. 11, fig. 34, 1910 ; 

 Way, Puget Sd. Mar. Sta. Publ., 1, 366, fig. 23, 1917. 

 Characters. — Carapace elliptical, more or less evenly rounded at sides, antero- 

 lateral and posterolateral margins not meeting at a distinct angle, carapace widest 

 at seventh or eighth tooth; twelve or thirteen teeth; fronto-orbital width nearly 

 one-half the width of the carapace. Merus of outer maxillipeds with antero-external 

 angle produced. Carpus of chelipeds with a spine at the antero-internal angle 

 below which there is a tooth; hand thick and high, the short upper edge of palm 

 with two rows of small tubercles, outer surface with five delicate granulated lines; 

 fingers of chelipeds with dark color reaching more than half the length of the 

 outer margins, movable finger almost entirely dark colored. 



Dimensions. — Type: length of carapace 18 mm., width 23 mm.; large female, 

 36.5 mm. long, 47.1 mm. wide (Eathbun). 



Color. — Areolae bright red, chelipeds and legs flesh color, fingers black 

 (Holmes). Dark red above, lighter beneath; walking legs in some cases with 

 light spots which tend to give the legs a somewhat banded appearance. There is 

 considerable variation in color; in some specimens a very irregular band of 

 orange or yellow extends across the carapace anterior to the cardiac groove, with 

 the whole carapace more gray and more or less spotted ; in others the median line 

 from the posterior end to beyond the cardiac groove shows very gray (Way). 

 Type Locality. — Puget Sound. 



Distribution. — Aleutian Islands to Lower California (Holmes). Low water to 

 238 fathoms (Eathbun). 



Family Atelecyclidae 



Carapace subeircular; front with several teeth, with either a median notch or 

 tooth. Antennules fold back longitudinally. Antennal flagella long and hairy, 

 or wanting. Third maxillipeds overlapping endostome. 



