NO. I POINT BARROW AMPHIPODA — SHOEMAKER 27 



the length of the body. Antenna i, first and second joints about 

 equal in length; third joint half the length of the second; flagellum 

 perhaps a little longer than the peduncle and consisting of about 

 13 joints. Antenna 2, fourth and fifth joints about equal in length; 

 flagellum a little longer than the fifth joint and consisting of 11 joints. 

 Maxilla i, inner plate with i apical seta; outer plate with 5 long and 

 I short spine tooth ; palp 2-jointed, second joint bearing 7 spines on 

 inner distal margin. Mandible without palp, but having a slender 

 seta in its place ; accessory plate with broad, very finely toothed edge 

 like a very fine comb; spine row of about 12 slightly curved spines. 

 Coxal plates shallow and not much deeper than their body segments ; 

 fourth coxal plate small. 



Gnathopod i, second joint not as long as the fifth and sixth com- 

 bined ; fourth joint as long as the fifth and produced forward beneath 

 the fifth; fifth joint a little longer than wide and about as wide as 

 the sixth; sixth joint a little longer than wide, and widest in the 

 middle, palm oblique, convex, finely dentate, merging into the hind 

 margin of joint with a scarcely perceptible angle bearing a short spine ; 

 seventh joint fitting palm and bearing fine teeth on the inner margin. 

 Gnathopod 2 with second joint about as long as the sixth ; fifth joint 

 short and narrowly produced below between the fourth and sixth; 

 sixth joint stout, about two-thirds as wide as long, and widest in the 

 middle; palm oblique, armed with low teeth and defined by a blunt 

 angle bearing a short spine on outside and one on inside; seventh joint 

 slightly curved and about as long as palm. Peraeopods are short and 

 rather stout. Peraeopods 4 and 5 are alike; fourth joint expanded 

 and produced behind nearly to the end of the fifth joint. Telson is 

 without lateral spines and reaches to about the middle of the peduncle 

 of uropod 3. Uropod 3 bears a few small spinules. The male is a 

 little shorter than the female. 



Female. — The female closely resembles the male even in the second 

 gnathopods; the antennae, however, are shorter. Length 7 mm. 



Type. — A male, U.S.N.M. No. 95193, taken 6 miles off Point 

 Barrow base, Alaska, in 341 feet of water, October 11, 1949, by 

 George E. MacGinitie. 



STENOTHOIDES ANGUSTA, new species 

 Figure 9, a-i 



Material collected. — In 140 feet, August 21, 1948, 4 specimens $. 

 In no feet, September 8, 1948, i specimen. In 10 to 125 feet, Sep- 

 tember 8 to 15, 1948, I specimen. In 120 feet, September 15, 1948, 



