1G8 STALK-EYED CRUSTACEA. 



orbital angle. The bianchiostegal spine is small, and continuous with a 

 lono-itudinal carina that runs along the branchial region of the carapace. 

 A low fold or ridge maiks the upper boundary of the branchial region. 



The abdomen is carinated in the median dorsal line on the second to the 

 sixth segments inclusive; the carina is most prominent on the third segment, 

 where it is produced into a strong posterior tooth, which overhangs the 

 anterior part of the fourth segment; the three following segments are 

 furnished with minute posterior teeth. The posterior half of the telson in 

 the luiique specimen at hand is missing ; there is one pair of minute marginal 

 spines at the hind end of the remaining proximal half. The ej'es and eye- 

 stalks are well developed, the stalks broadening toward the distal end and 

 projecting a slender blunt process on the inner side close to the cornea; the 

 eye itself is as broad as the distal end of the peduncle. 



The basal segment of the antenna is armed with an acute external spine ; 

 the antennal scale is long, gradually narrowing distally to the apex, which 

 is furnished with a small spine. 



The thoracic appendages have the form characteristic of the genus Acan- 

 thephyra, and ajjpear to offer no important specific characters. 



Length, 87 mm.; carapace, 27 mm.; antennal scale, 16 nun. 



Station 3381. 1772 fathoms. 1 male. 



HYMENODORA G. 0. Sars. 



Arch, for Math, og Naturvid., II. 240, 1877. 



Hymenodora glacialis (Buchhole). 



Pasiphae glacialU Bcchiiolz, Zweite Deutsche Nordpohirfahrt, II. 279, Plate I. Fig. 2, 1874. 



Hymenodora glacialis G. O. Sars, Arch, for Math, og Naturvid., II. 241, 1877; Norske Nordhavs-Expcd., 

 Crustacea, I. 37, 275, Plate IV., 1885. Norman, Proc. Roy. Soc. Edinburgh, 1881-S2, pp. 083, 684, 

 1882. Smith, Proc. U. S. Nat Mus., VII. 501, 1885 ; Rep. U. S. Pish Couim. for 1885, p. 678, Plate 

 XV. Fig. 3, 10, Plate XVT. Fig. 5, 1886. 



This interesting animal was first discovered by the second German North 

 Polar Expedition in 1869, near the 74th parallel of latitude, off the east 

 coa.st of Greenland. The solitary specimen obtained was found on the 

 surface at a considerable distance from the limit of the pack-ice. It was 



