REPORT ON THE AMPHIPODA. 1277 



The Telson is minute, triangular, nearly once and a half as long as broad. 



Length, without the antennas, two-fifths of an inch. 



Locality. — The label " September 29, 1873," refers this species to the South Atlantic, 

 off the coast of Brazil, lat. 19° 6' S., long. 35° 40' W. Six specimens, two of them males. 



" October 5, 1873, South Atlantic, surface, night ; " between lat. 26° 15' and 29° 35' S., 

 long. 32° 56' and 28° 9' W. One specimen, male.- 



A specimen labelled " New Hebrides, August 23, 1874," does not seem distinguishable 

 from this species, although coming from a very distant locality, between lat. 15° 58' and 

 14° 7' S., long. 160° 48' and 153° 43' E. It has, however, a shorter wrist to the first 

 gnathopods, and the outer ramus of the third uropods is more than half the length of the 

 inner ramus. 



Remarks. — Whether this be really Milne-Edwards' briefly described species from 

 the Atlantic must perhaps remain a little uncertain. He describes the upper antennas 

 as longer than the body, but whether by this he means the perseon and pleon without 

 the head and the uropods is not clear. " Tyro Sarsii " of Bovallius is very near to, if not 

 identical with, the present species, but there seems to be little to separate that species 

 from Tyro comigera. Dana's Clydonia gracilis agrees with the present species in so 

 minute a particular as having "eyes small, nine lenses"; the description of Astacus 

 crassicornis, Fabricius, is too vague and erroneous to entitle the specific name to the 

 honour of priority. 



Family V i b i l i d m, Claus, 1872. 



In 1840 Milne-Edwards formed the " Tribu des Hyperines gammaroides," to receive 

 the single genus Vibilia. In 1852, Dana placed this tribe in the family Hyperida?, as 

 " Subfam. 1. Vibilinse." Claus changed the subfamily into the family Vibilidae. This is 

 changed into Vibiliidaa by Carus in 1885, but written Vibdidse by Gerstaecker in 1886, 

 and by Bovallius in 1887. None of these writers increase the number of genera in the 

 family. In the table of generic divisions belonging to his " Famille des Hyperines," 

 Milne-Edwards, in 1830, attributes to Vibilia, " pattes-machoires presentant des rudi- 

 mens de tiges palpiformes." These he figures in his later work, pi. xxx. fig. 2. Dana 

 in 1852, and Carus in 1885, retain these rudimentary palps of the maxillipeds as a 

 character of the group, but it is almost certain that the original mention of them was 

 due to some error of observation ; Marion in 1874 expressly denies their existence either 

 in adult or young of Vibilia jeangerardii, Lucas. Bovallius in 1887 gives the following 

 character of the family : — 



" Head small, not tumid ; eyes mediocre, resembling those in the Gammarids. Both 

 pairs of antennae fixed at the anterior side of the head. First pair with the first joint 



