80 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 37. 



long. 179° 14' E.; station 4781, on the way from "Petrel Bank," 

 Bering Sea, to McDonald Bay, Agattu Island, Aleutians, by the pas- 

 sage east of Semisopochnoi and Amchitka Islands, at lat. 52° 14' 30" 

 N.; long. 174° 13' E. 



Depth. — Three hundred and forty-four to four hundred and eighty- 

 two fathoms in fine gray sand and pebbles, in green and brown sand, 

 and in broken shells. 



JEGA MAGNOCULIS, new species. 



Body ovate, about twice as long as wide (11 mm. : 21 mm.). Sur- 

 face smooth. Color, in alcohol, yellow. 



Head wider than long, 2 J mm. long by 5J mm. wide. Front pro- 

 duced in a small median point, separating the basal articles of the 

 first antennae. Eyes large, oval, occupying almost the entire surface 

 of the head, and separated from each other by a distance equal to 

 half a millimeter. The first pair of antennae have the two basal ar- 

 ticles not dilated, and subequal; the third is narrow, elongate, and 

 equal in length to the first two articles taken together ; the flagellum is 

 composed of eighteen articles. The first antennae 

 extend to the posterior margin of the first thoracic 

 segment. The second antennae, with a flagellum 

 of twenty-one articles, extend to the posterior mar- 

 gin of the third thoracic segment. The frontal 

 FI noculis^ ]GA h Tad lamina is conical, with the distal end flat and 

 and first two seg- ovate, the proximal end produced to a point- 



MENTS OF THORAX. ^ segmentg Q f ^ ^ ^qual, the 



last one being slightly shorter than the others. 

 The epimera are large, subquadrate, with the outer post-lateral angle 

 acute and produced posteriorly in the last three segments beyond the 

 posterior margin of the segments. 



The first segment of the abdomen is almost entirely covered by 

 the seventh thoracic segment, especially in the middle dorsal region ; 

 the following three segments are subequal; the fifth segment is 

 slightly longer in the middle dorsal region; the sixth or terminal 

 segment is rounded, with the apex produced in a small point, on either 

 side of which the posterior margin is serrulate. The uropoda extend 

 a little beyond the terminal abdominal segment; the inner branch 

 is slightly longer than the outer branch, is also wider and has the 

 posterior margin obliquely truncate, with the outer angle produced 

 acutely ; the outer branch is ovate with the posterior extremity acute. 

 Both branches have the margins serrulate. 



The first three pairs of legs are prehensile. There is one small 

 spine at the distal extremity of the propodus, and one larger spine 

 on the carpus. A few small spines are also on the merus. The last 



