164 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, 1 28 



depths of no to 741 feet, with the highest yield (25) from 453 feet. 

 Males up to 5.2 mm. long and females up to 5.5 mm. were taken. 

 Juveniles from 1.5 to 2.0 mm. long were taken at 453 and at 162 feet. 

 This species has a shiny, brownish-gray body, with small, oval, dark 

 eyes. From 5 to 14 white eggs, measuring 0.5 mm. in diameter, were 

 counted from ovigerous females from 4.5 to 5 mm. long. This species 

 is new to the western Arctic. 



Eurystheus melanops Sars, also new to the western Arctic, was 

 taken in most hauls from no to 741 feet. Males up to 9 mm. were 

 taken, and juveniles were collected on August 30 and October 11, 1949. 

 The upper portion of the body is pale gray, the remainder transparent, 

 and the large, round eyes are black. From 3 to 18 eggs, 0.4 to 0.5 mm. 

 in diameter, were taken from females from 3.5 to 14 mm. in length. 

 The eggs were white or cream or yellow. This variation in the color 

 may be due to the stage of development, but the variation in length 

 of the females suggests either that they begin reproducing at an 

 early age or that two species are represented. 



One male and two ovigerous females of Protomedeia fasciata 

 Kroyer were dredged at 80 feet and numerous specimens from 7 to 

 8 mm. in length were taken at no feet (September 8, 1948). The 

 body of this species is marked with grayish brown or gray on a whitish 

 background, and the eyes are black, with the facets outlined in white. 

 The eggs are purplish blue. A few specimens of Protomedeia grandi- 

 mana Briiggen were also collected. Both species are new to Alaska 

 and the western Arctic. Eleven specimens of a new species, Proto- 

 medeia stephenseni Shoemaker (1955), washed ashore in August and 

 September 1950. 



No haul from 80 to 741 feet was without Ischyrocerus latipes 

 Kroyer, sometimes so numerous that only a few representative speci- 

 mens could be picked out and preserved. The largest were about 17 

 mm. long. Juveniles were taken throughout the open season. This 

 species is usually marked with silvery gray on a lighter background, 

 but some individuals have purplish-brown markings and others are 

 tinged all over with dull rose orchid. The small, nearly round eyes 

 are black in the center with reddish brown around the periphery. 

 Juveniles are grayish white. Embryos are white, with a speck or 

 two of red. A female 12 mm. long from 453 feet had parasitic cope- 

 pods and their egg sacs in the posterior half of her marsupium, and 

 another female had parasitic copepods and egg sacs filling the entire 

 marsupium. This amphipod is apparently new to Arctic America. 



The less conspicuous Ischyrocerus commensalis Chevreux (up to 

 5 mm. in length) was in hauls from no to 453 feet. This amphipod 



