NO. I POINT BARROW AMPHIPODA — SHOEMAKER 6$ 



Gnathopod i slender ; second and fifth joints equal in length ; sixth 

 joint a little shorter than the fifth, but equal to it in width ; palm very 

 short and oblique and defined by a very thin lamella bearing very fine 

 marginal teeth ; hind margin of joint bearing 3 stout spines and several 

 long slender spines ; seventh joint reaching down beyond the middle 

 of hind margin of the sixth joint, and armed on the inner margin 

 with very fine teeth and a number of setules. Gnathopod 2 much 

 larger and stronger than i ; second joint short and broad and slightly 

 produced at the lower front corner; fifth joint shorter than wide; 

 sixth joint strongly developed and one-third longer than wide; palm 

 very oblique and nearly twice as long as the hind margin of the joint, 

 a protuberance bearing a notch near the hinge, rest of palm sinuous, 

 and concave near the defining angle; the defining angle and the 

 adjacent border of the hind margin produced into a thin lamella 

 which projects inward toward the axis of the body; seventh joint 

 strongly curved, with the apex resting on the inside of palm near 

 the defining angle, and bearing a prominent knob which rests on the 

 inner surface of the protuberance of the palm when the joint is closed 

 against the palm. 



Peraeopods i and 2 alike, fourth joint expanded ; fifth joint a little 

 over half the length of the sixth; both fifth and sixth joints slender; 

 seventh joint slender and not quite half the length of the sixth. 

 Peraeopods 3 to 5 missing. Metasome segments with the lower 

 lateral hind margin bulging considerably backward, and with the 

 lower hind angle obtuse. The first and second urosome segments with 

 a seta on either side of the posterior dorsal margin. 



Coxal plate i the narrowest and 2 the broadest. Uropods i and 2 

 extending back about the same distance, with the outer ramus a little 

 shorter than the inner. Uropod i, peduncle armed on upper outer 

 margin with about 9 short spinules, and with the lower distal end 

 produced into a stout upward-curving tooth or projection. Uropod 2, 

 peduncle with i or 2 spinules on upper outer margin, and without 

 a tooth or projection on the lower distal end. Uropod 3 not reaching 

 back quite as far as 2 ; rami of nearly equal length and as long as their 

 peduncle. Telson not reaching to end of peduncle of uropod 3, wider 

 than long and bearing a few posterior setae. The length of the male, 

 7 mm. Stebbing gives 91 m. for the depth of this species. 



Family JASSIDAE 

 ISCHYROCERUS LATIPES Kroyer 



Ischyrocerus latipes Kroyer, 1842, p. 162. — Stephensen, 1913, p. 212; 1944b, 



p. 124. — SCHELLENBERG, I924, p. 210, fig. 10 ; I93S, p. 29. — GuRJANOVA, I93Sa, 



p. 77' 



