DECAPODS 133 
A’, No long suberect spine situated on the rostrum; fewer than four spines 
on median carina. 
B. Carapace elongate, about one fifth longer than wide; blade of an- 
tennal scale considerably overreaching the spine. . . doreas. 
B’. Carapace nearly as long as wide; blade of antennal scale not over- 
reaching the spine. . . + + © + © + © 6 © » alata, 
SCLEROCRANGON BOREAS (Phipps). 
Cancer boreas PuiPpPs, Voyage North Pole, 190, pl. XII, fig. 1, 1774. 
Crangon Boreas SABINE, in Suppl. to Appendix of Capt. Parry’s [First] Voyage, 
p. ccxxxv, 1824. 
Sclerocrangon boreas SARS, Den Norske Nordhavs-Expedition, XIv, Zoologi, 
Crust., Pt. 1, p. 15, 1885.—HOLMES, Occas. Papers Calif. Acad. Sci. Vit, 
177, 1900, and synonymy. 
Carapace one fifth longer than wide; three equidistant spines on the 
dorsal carina; a tuberculated carina on the branchial regions armed with 
an anterior spine and one or two obscure teeth. Rostrum triangular, 
acute; tip horizontal. Antero-lateral angles armed with a spine project- 
ing forward or a little outward. Blade of antennal scale much produced 
beyond the spine. Hand twice or more than twice as long as wide; distal 
margin obliquely transverse; spine obliquely longitudinal. The merus has 
an upper distal spine, the carpus a lower distal spine. 
Abdomen sculptured, the anterior segment with a median dorsal carina 
which forms a forward projecting tooth on the first segment; the sixth 
segment with a double carina, with a sulcus between the ridges; also on 
each side of the posterior margin a supero-lateral spine. Pleura of the 
abdominal segments with only one spine each. Telson sulcate; two pairs 
of lateral spinules on the terminal half. 
Dimensions.—Male (Alaska), length 110 mm., length of carapace 32 
mm., width of carapace at branchial spine 26.4 mm., length of hand 
13.2 mm., width of hand at inner base of spine 6 mm. 
Harriman Expedition,—Kadiak, 5 fathoms (W. R. Coe); Berg Bay, 
Glacier Bay. 
Distribution,— Arctic Europe and America; Atlantic coast of America 
southward to Cape Cod; Alaska (as far south as Killisnoo) ; ‘ California’ 
(Ross, Owen); Siberia; Kamchatka (Ross). Depth, 1-44 fathoms. 
Numerous specimens were taken by the 4/atross in Bristol Bay and 
vicinity in 31%{/-17 fathoms; by the U. S. R. S. Corwin in lat. 669 12’ 
oo” N., long. 168° 54/ oo” W., 30 fathoms, lat. 65° 49’ 15’ N., long. 
169° 04! 30 W., 26 fathoms, and lat. 71° 02/ oo” N., long. 157° 46/ 
oo” W., 19 fathoms. 
Killisnoo, Alaska (Northwestern Trading Company). 
Plover Bay, Siberia, 10-25 fathoms (W. H. Dall). 
