\\ \ 



Family CANCRID.E. 

 Genus Cancer Linna-u-. 

 Cancer magister l);m:i. 



(Dana, Proc. Acad. Nat. Sri. Philadelphia, lSf>2, p. 7:<; Crust. I'. S. Kxplorinn K\pr<l., p : u-t I, 

 1852, p. 1.51; atlas, 1X5.-,. pi. VII, figs, la d.) 



Beach at Orca (Cordova), Southeastern Alaska: September 5, 1916; station 

 60a; one carapace. 



DISTRIBUTION. -Unalaska to Magdalena bay, Lower California: low water 

 to 50 fathoms. 



Superfamily OX Yh'll Y \<IIA. 



Family INACHID/E. 

 Genus Hyas Leach. 



Hyas coarctatus Leach. 

 (Rathbun, Proc. U. S. Nat. Mus., vol. X\'I, 1893, p. 69.) 



Off Icy cape, Arctic Alaska; hit. 70 24' N., long. 161 25' W.; 9-10 fathoms; 

 mud, with pebbles, but no alga?; August 19, 1913; station 23; four cf, four 9. 



Langton bay (East of Mackenzie river), Northwest Territories; October 

 26, 1910; Dr. R. M. Anderson; fifteen specimens (Amer. Mus. Nat. Hist.), two 

 of which were taken in the net in 8 fathoms of water. A note accompanying 

 the crabs states that they are known to the Kotzebue sound Eskimos as 

 Tu-tu-ri-ak,' but are unknown to the people east of the Mackenzie. 1 



DISTRIBUTION (including Hyas coarctatus alutaceus Brandt). Arctic Siberia 

 to Langton bay; Bering sea to Aleutian islands; Kamchatka; Okhotsk sea to 

 Korea (lat. 37 02' N.); Baffins bay and Eastern Greenland to Hudson strait 

 and bay; and southward to off cape Hatteras, North Carolina; Iceland; Northern 

 Europe southward to about lat. 49-5 N. (Dons); shallow water to ( .i<)ii 

 fathoms. 2 



Various larvae from the following stations have been referred to this species: 



Off Cooper island, point Barrow, Alaska; surface; August 27, 1913; stations 

 25 b, c; three zoeae. 



Off cape Lisburne, Arctic Alaska; lat. 68 48' N., long. 165 10' W.: surface; 

 August 16, 1913; stations 21 c, d, e, f; three specimens of zoeae. more than 

 twenty-five specimens of megalopa, first form, with three-spined front, eight 

 specimens of megalopa which may be a development from the preceding and 

 from which the median or rostral spine has disappeared. 



Off Nunivak island, Bering sea; lat. 60 09' N., long. 167 38' \V.: surface; 

 July 6, 1913; about 50 zoeae. 



South of Shumagin islands; lat. 54 30' N., long. ir>'. 42' W.: surface; 

 July 1, 1913; stations 13 a, b, c; three megalopa, second form. 



The zoese and first megalops resemble 1 those of Hyas animus " <ir< n< us ' 

 described and figured by Williamson, Fisheries Board, Scotland. Sri. Invest., 

 1909, I (Dec., 1910), pp. 15-10. pi. I, figs. 1 and 2. Williamson considered 

 that his megalopa moulted into the first crab stage. The rostrum of a similar 

 megalops, but with longer median spine, is figured as //. coarctatus by Bjorck, 

 Acta Reg. Soc. Physiog. Lunderisis, n.f., vol. XXIV. I'.H:;, p. 22, te\t-ti">. 1 and 2. 



'These specimens have been identified by Dr. \V. (1. Y:m Name and tin- information communicated l>y Dr. Ho\ \\ . 

 Miner, of the American Museum of Natural History. 



2 A station label indicating this treat depth acoompanie- t hf - pee i men - , rec '"li->l see Ilan-'-n. 1 > mi-h [ngolMSlp 1 1 

 tion. III, 2, 1903, p. 1C), but an error may. of course, have IHTM made at Hie tin Hon. 



