DECAPODS 41 
Distribution.—From Unalaska to southern California, 35 to 178 
fathoms : 
Monterey and San Pedro, California (D. S. Jordan, 1880), 
Taken by the 4/éatross at the following localities: 
Iliuliuk Harbor, Unalaska, 85, 68 fathoms, station 3311 (1 specimen), 
station 3313 (1 specimen). 
Gulf of Georgia, British Columbia, 67 fathoms, station 2863 (1 
specimen). 
Strait of Fuca, 98-152 fathoms, stations 3447-3456, 3458, 3459, 3461. 
Off Strait of Fuca, 142 fathoms, station 3457. 
Flattery Bank, Washington, 77 fathoms, station 3673. 
Off Tahwhit Head, Washington, 178 fathoms, station 3076. 
Near Flattery Rocks, Washington, 171 fathoms, station 2866. 
Off Grays Harbor, Washington, 48-58 fathoms, stations 2870, 3046 
(abundant), 3047 (abundant), 3048. 
Off Columbia River, 55-68 fathoms, stations 2882 (abundant), 3066. 
Off Tillamook Rock, Oregon, 46 fathoms, station 3064. 
Off False Tillamook, Oregon, 62 fathoms, station 3090. 
Off Siletz Bay, Oregon, 77 fathoms, station 3059. 
Off Heceta Bank, Oregon, 93 fathoms, station 3080. 
Off Point Arena, California, 51 fathoms, station 3251. 
Off Bodega Head, California, 167 fathoms, station 3170. 
Off Tomales Point, California, 57 fathoms, station 3175. 
Off Drake Bay, California, 35 fathoms, station 3155. 
Monterey Bay, California, 56 and 68 fathoms, stations 3666, 3671. 
San Luis Obispo Bay, California, 77 fathoms, station 3197. 
Off Santa Cruz Island, California, 155 fathoms, station 2949 (type 
locality). 
Southwest of San Nicholas Island, California, 158 fathoms, station 2898. 
Distinguished from /. dorealis, which has a similar rostrum, by the 
reduction of the abdominal lobe or hump, and the absence of posterior 
median spines on third and fourth segments. 
PANDALUS MONTAGUI TRIDENS Rathbun. 
Plate 11, fig: 2: 
? Pandalus annulicornis RICHTERS, Abh. Senck. Natur. Gesell., XIII, 405, 
1884. Bering Sea, N. of Akutan Pass, 70 fath.; Plover Bay. 
Pandalus montagui RATHBUN, The Fur Seals and Fur-Seal Islands of the 
North Pacific Ocean, Pt. III, 557, 1899. 
Pandalus montagui tridens RATHBUN, Proc. U. S. Nat. Mus., XXIV, gol, 
1902. 
Distinguished from the three foregoing species by its non-carinated ab- 
domen devoid of a hump. Rostrum slender, from one and a half to one 
and four fifths times the length of carapace. Dorsal spines ro to 12 in 
