Harriman Alaska series . rait of Fuca, 152, 114 fathoms, stations 3454, Flattery Rocks, Washington, 171 fathoms, station Bank, Oregon, 50 fathoms, station Point Conception, California, 145 fathoms, station Santa Cruz Island, California, 150 fathoms, station 2946 (type local-ity). Off Santa Rosa Island, California, 52 fathoms, station San Diego, California, 124 fathoms, station 2935. DECAPODS 81 SPIRONTOCARIS TRIDENS tridens RATHBUN, Proc. U. S. Nat. Mus., xxiv, 896, 1902. Allied to 6*. gracilis, S. flexa, and S. decora^ but
Harriman Alaska series . rait of Fuca, 152, 114 fathoms, stations 3454, Flattery Rocks, Washington, 171 fathoms, station Bank, Oregon, 50 fathoms, station Point Conception, California, 145 fathoms, station Santa Cruz Island, California, 150 fathoms, station 2946 (type local-ity). Off Santa Rosa Island, California, 52 fathoms, station San Diego, California, 124 fathoms, station 2935. DECAPODS 81 SPIRONTOCARIS TRIDENS tridens RATHBUN, Proc. U. S. Nat. Mus., xxiv, 896, 1902. Allied to 6*. gracilis, S. flexa, and S. decora^ but more robust thanthese. Female.—The median crest occupies the anterior third of the carapace;superior spines or teeth 3, one on the carapace, one (the largest andhighest) over the base of the eye-stalk and nearer to the anterior than tothe posteriortooth. In frontof the teeth therostrum has al-most no upperlimb and is gentlyascending andslightly curved;midrib rather stoutand acute at tip;the lower limb diminishes ante-. FIG. 34. Spirontocaris tridens. $ . Station 2865. a. Side of carapace and riorly and is armed abdomen (X ij)- &• Dorsal view of anterior portion (X 3>- with 3 to 6 teeth, one near the tip. Rostrum longer than the carapaceor antennal scale. Anterior margin of carapace furnished with a strongantennal and a very small pterygostomian spine. Antennular peduncle extending two fifths the length of the antennalscale; second and third segments short and subequal; basal scale with aspine which extends nearly to the end of the second segment. Thethickened portion of the outer flagellum reaches nearly to the end ofthe antennal scale; inner flagellum twice as long. The antennal pedun-cle extends a little beyond the end of the second antennular segment;the flagellum is nearly as long as the body; the scale, measured alongits outer margin, is a little shorter than the carapace. The maxillipeds reach two thirds the length of the antennal scale;the first pair of feet bare
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