234 



HOLMES 



with an oblique, slightly curved palm which is provided with a short 

 stout spine at the posterior end. Second gnathopods of the female with 

 the merus produced below into a narrow rounded setose lobe ; the carpus 

 relatively large, with a prominent, rather narrow setose lobe behind; 



Fig. ii8. Allorchestes ochotensis. agnf = second gnathopod of ? ; other figures from a 4 . 



hand oblong, narrower than the carpus, relatively smaller and narrower 

 than in the male, but otherwise quite similar ; dactyl less strongly curved 

 than in the male, and fitting closely to the palm. Posterior margin of the 

 basal joints of the last three pairs of perseopods smooth. Peduncle of the 

 first uropods nearly as long as the rami, and armed distally with a slender 

 spine. Rami of the second uropods subequal, longer than the peduncle, 

 the inner ramus rather broad at the base. Terminal uropods reaching 

 about to the middle of the rami of the second pair, the ramus nearly as 

 long as the very broad peduncle. Telson broad, cleft nearly to the base, 

 the lobes armed distally with a pair of spines and several setae. 



Length 20 mm. 



Several specimens collected by Dr. W. R. Coe, at Dutch Harbor, 

 Alaska. In the larger specimens the last two thoracic and first three 

 abdominal segments are elevated posteriorly and terminate abruptly, 

 giving the back almost the appearance of being dentate. 



YzxoMy LYSIANASSID^. 

 TRYPHOSA NUGAX sp. nov. 

 Type from St. Paul, Pribilof Islands, Alaska (a single specimen). 

 Body plump and compact. Eyes oval. Lateral angles of the head pro- 

 duced and rounded. Anterior pairs of coxal plates about twice as deep 



