168 STALK-EYED CRUSTACEA. 
orbital angle. The branchiostegal spine is small, and continuous with a 
longitudinal carina that runs along the branchial region of the carapace. 
A low fold or ridge marks 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 unique specimen at hand is missing; there is one pair of minute marginal 
spines at the hind end of the remaining proximal half. The eyes 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 appear to offer no important specific characters. 
Length, 57 mm.; carapace, 27 mm.; antennal scale, 16 mm. 
Station 3381. 1772 fathoms. 1 male. 
HY MENODORA G. O. Sars. 
Arch. for Math. og Naturvid., II. 240, 1877. 
Hymenodora glacialis (Bucnuorz). 
Pasiphae glacialis Bucunowz, Zweite Deutsche Nordpolarfahrt, IT. 279, Plate I. Fig. 2, 1874. 
Hymenodora glacialis G. O. Sars, Arch. for Math. og Naturvid., II. 241, 1877; Norske Nordhavs-Exped., 
Crustacea, I. 37, 275, Plate IV., 1885. Norman, Proc. Roy. Soc. Edinburgh, 1881-82, pp. 683, 684, 
1882. Smiru, Proc. U. S. Nat. Mus., VIT. 501, 1885; Rep. U.S. Fish Comm. for 1885, p. 678, Plate 
XV. Fig. 3, 10, Plate XVI. Fig. 5, 1886. 
Station 3383. 1832 fathoms. 3 fem. 
3399) 740 cS 2 males, 1 fem. 
3433. 1218 ne Ave Saas 
eT S400c 905 oe 1 fem. 
This interesting animal was first discovered by the second German North 
Polar Expedition in 1869, near the 74th parallel of latitude, off the east 
coast of Greenland. The solitary specimen obtained was found on the 
surface at a considerable distance from the limit of the pack-ice. It was 
