REPORT ON THE AMPHIPODA. 1575 



that of the inner, with six or seven plumose setae on the outer and two or three on the 

 inner margin ; joints of each ramus numbering eight or nine. 



Uropods. — Peduncles of the first pair reaching just beyond the bases of the third 

 pair, a little longer than the outer ramus, probably a little shorter than the inner ; the 

 outer ramus narrower and no doubt shorter than the broken inner ramus, closely 

 pectinate along both margins, curving a little inwards ; the inner ramus curving a bttle 

 outwards, more loosely pectinate on the inner than on the outer margin ; both rami 

 carinate on the under surface ; the second pair altogether missing on one side and on 

 the other perhaps incompletely developed, the peduncle much shorter and narrower than 

 the peduncles of the first pair, on the inner side bluntly produced for less than half the 

 length of the small outer ramus, which scarcely reaches to the end of the peduncle of 

 the first pair ; peduncles of the third pah' completely coalesced with the inner ramus ; 

 the outer ramus, to judge by the one remaining stump, is evidently narrow and probably 

 short ; the inner ramus apart from the distally widened peduncle is rather shorter than 

 the outer ramus of the first pair, the first half broad, with both margins convex, the 

 terminal half narrow ; the margins are pectinate, the under surface carinate, the ter- 

 minal part of the ramus bending outwards, the whole ramus not quite twice as long as 

 the peduncle, with which its inner margin is completely continuous. 



Telson on the upper surface quite coalesced with the preceding composite segment, 

 which it exceeds in length ; the breadth at the base about equal to the length ; the 

 sides for much of the length convex, converging very slightly, distally a little concave, 

 converging rapidly to an almost acute apex halfway down the narrow part of the inner 

 ramus of the third uropods. 



Length, in the somewhat bent position figured, a quarter of an inch. 



Locality. — April 13-14, 1876, Atlantic, off coast of Africa ; lat. 11° 5' N., long. 

 18° 15' W. ; surface; surface temperature, 74° - 7. One specimen, male. 



Remarks. — The small differences in the upper antennae and mandibular palp between 

 this specimen and that described by Glaus are evidently not of specific value. The 

 first joint of the fourth pergeopods and the finger in the fifth do not agree with Claus' 

 figures, but he does not specially describe those parts ; there are also differences in the 

 uropods, but, as already observed, the Challenger specimen may be a little abnormal in 

 this respect. 



Family Oxycephalid^e, Spence Bate, 1862. 



Dana in 1852 made the Oxycephalinaa the third subfamdy of the Typhidse. Spence 

 Bate in 1862 established the Oxycephafidse as the fifth family of the Hyperina, including 

 in it two subfamilies, the Synopiades and Oxycephalides. By later writers the Synopiades 



