AMPHIPODS 239 



GAMMARUS CONFERVICOLUS Stimpson. 

 Sitka, Alaska, and Grenville Channel (Ritter). 



GAMMARUS PUGETTENSIS Dana. 

 Dana, Crustacea, U. S. Expl. Exp., xiv, Pt. 11, p. 957, pi. 66, fig. i, a-g, 1852. 

 Dana states that the fourth segment of the abdomen in this species is 

 acute above, but it is the fifth segment instead of the fourth which is acute. 

 Dana's figure shows that the second pair of uropods articulate with the 

 segment which bears the acute dorsal process. Several specimens were 

 obtained at Garforth Island, in Glacier Bay, by the Harriman Expedition. 



CARINOGAMMARUS SUBCARINATUS (Bate). 



Several specimens from Wrangell, Garforth Island, and Dutch Harbor, 

 Alaska. 



MAERA DUBIA Caiman. 



Several specimens from Popof Island, Alaska, taken from under rocks 

 on the shore. 



Family PHOTID.^. 



GAMMAROPSIS TENUICORNIS sp. nov. 



Type from Puget Sound (a single male specimen). 



Eyes oblong, oblique. Anterior angle of the head terminating in an 

 acute upturned tooth. Antennae slender, of subequal length, and over 

 half the length of the body ; the first joint of the peduncle of the first 

 pair stout and slightly over half the length of the second, which is very 

 slender and a little longer than the third ; flagellum nearly as long as the 

 peduncle, the secondary flagellum composed of seven elongated joints 

 and about equahng the last joint of the peduncle. Second antennae 

 with the peduncle slender, the gland cone of the second joint elongated 

 and narrow, last two joints of subequal length ; flagellum shorter than 

 the peduncle, the joints shorter but scarcely stouter than those of the 

 flagellum of the first pair. Coxal plates but little deeper than their 

 segments, the first pair small and armed with several serrations around 

 the postero-inferior angle, the corresponding angle of the three succeed- 

 ing coxal plates with a minute denticle. First gnathopods rather slender 

 and elongate, the basal joint bent forward, the carpus narrow, longer 

 than the propodus, and widening gradually toward the distal end ; hand 

 with the posterior margin quite evenly curved. Second gnathopods 



