200 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
as in the female. The first antenna on the left side is geniculate and 
longer than the right one, with the terminal portion 4-segmented. 
The other appendages are like those of the female, except the fifth 
legs shown in figure 50. The basipods of these legs are considerably 
enlarged and the second segment in each leg has on its posterior sur- 
face a laminate process tipped with a dense fringe of fine hairs which 
completely covers the basal endopod segment. ‘These endopods are 
3-segmented, the left one a trifle the longer and its end segment with 
six setae while the end segment of the right endopod has five setae. 
The middle segments each have a single seta, and these, as well as the 
setae on the end segments, extend straight across and overlap those 
on the opposite leg. The proximal segment of each exopod has a 
small spine at its outer distal corner, and the second segment has a 
stout curved spine on its inner margin at the base. On the right leg 
the inner distal corner of this second segment is protruded into a blunt 
process covered with fine hairs. The end segment is tipped with a 
couple of spines and carries on its inner margin a semicircular trans- 
parent pad that covers the bases of the terminal spines and extends 
back to the hairy process of the second segment. The end segment 
of the left exopod has two spines on its inner margin and is tipped 
with a long stout spine bent near its base and acuminate at its tip. 
Total length 9 to 9.50 mm. 
Allotype female-—U.S.N.M. No. 70744; station 4722, latitude 9°31’ 
S., longitude 106°30’ W., Galapagos to Paumotu Islands. 
ltemarks.—The exceptional inequality in the size of the two rami 
of the fifth legs in the female and the structural details of the fifth 
legs of the male are the distinguishing characters of this species. 
On comparing figure 50 of plate 4 with figure 9, plate 42, of the Siboga 
report it will be evident that the fifth legs of Scott’s single male were 
scarcely injured at all. On the contrary, Brady’s specimen was badly 
mutilated and owing to the separation of the two legs right and left 
have been transposed both in the description and in the labels of the 
figures. 
Genus DREPANOPUS Brady, 1883 
DREPANOPUS FORCIPATUS Giesbrecht 
Drepanopus forcipatus GIEsBRECHT, Atti. Acead. Lincei, Rome, ser. 4, vol. 4, sem. 
2, p. 335, 1888; Fauna und Flora des Golfes von Neapel, monogr. 19, p. 201, 
pl. 10, figs. 23-25, 27-80; pl. 36, figs. 36-38, 1892. 
[Station 2770. Almost coincidental with the publication of Gies- 
brecht’s description of this rare genus and species from both coasts 
of southern South America (lat. 45° S. and 49° S.) the Albatross 
secured some 500 female specimens in latitude 48° S., off the Argen- 
tine coast. The Albatross specimens, which may have been deter- 
