DECAPODS 43 



Shumagins, 21-69 fathoms, stations 2847, 2849-2852. 



Off Shumagin Bank, 138 fathoms, station 3339 (i peck rejected). 



Off the Trinity Islands, 67-159 fathoms, stations 2853, 3341. 



Portlock Bank, 51-230 fathoms, stations 2856 (abundant), 2857, 2858. 



Off Queen Charlotte Sound, British Columbia, 204 fathoms, station 2861. 



Near Flattery Rocks, Washington, 171 fathoms, station 2866. 



Off Point Arena, California, 239 fathoms, station 3349. 



Small specimens were collected by Dr. Dall at Bay of Islands, Adak, 

 Nazan Bay, Atka, and Iliuliuk Harbor and Captains Harbor, Una- 

 laska, in 3 to 80 fathoms. 

 Puget Sound (T. Kincaid). 

 Berg Bay, Glacier Bay (Harriman Expedition). 

 Juneau, 20 fathoms (Harriman Expedition). 



I have separated this form from P. montagui Leach of the North 

 Atlantic on account of its somewhat longer rostrum, which varies from one 

 and a half to one and two thirds times the carapace, the dorsal spines 

 terminating behind the middle of the rostrum, while in typical P. monta- 

 gui the rostrum is from one and two fifths to one and a half times the 

 carapace, and its dorsal spines reach to or in front of its middle. In P. 

 montagui the tip is bifid ; in the subspecies usually trifid. 



PANDALUS LEPTOCERUS Smith. 



Pandalus leptocerus SMITH, Proc. U. S. Nat. Mus., ill, 437, 1881; Bull. 

 Mus. Comp. Zool., x, 58, 1882; Kept. U. S. Commr. of Fish and 

 Fisheries for 1882, 367 [23], pi. v, fig. i, 1884. A. MILNE EDWARDS, 

 Recueil Planches Exped. Travailleur, pi. xxil, 1883. 



An elongate species. Surface of carapace and abdomen roughened 

 with short and irregular transverse, punctate ridges, which give rise to 

 very short, bristle-like hairs. 



Rostrum from about one and a third to nearly twice as long as the 

 rest of the carapace, and curved very slightly upward ; armed above 

 with ii to 13 movable spines, of which one is near the tip and usually 

 only two on the carapace proper, while a considerable space back of 

 the terminal spine is unarmed ; below 6 to 8 immovable spines. The 

 posterior dorsal spine is considerably in front of the middle. 



Outer maxillipeds provided with an exopod ; the endopod falls short of 

 the end of the antennal scale, and the first pair of feet are correspond- 

 ingly shorter than the maxillipeds. Right leg of second pair reaches 

 about to end of first pair; carpus has 5 segments, proximal half undi- 

 vided, and followed by 3 subequal segments, each about as long as broad, 

 together equal to terminal segment ; chela about half as long as carpus. 

 The left leg of second pair has 52 to 64 segments in the carpus; the 



