246 Miss D. A. Stewart on the Extra- Antarctic 



S. tropical Atlantic, as well as two new species of Vibilia, 

 which have been added to the list of those already known. 



The presence of several other already-known species in the 

 collection has also served to extend their geographical range 

 considerably southward. 



It may be as well, before proceeding to a description of 

 the various types, to indicate clearly the terminology which 

 has been adopted throughout. In all Amphipoda, the first 

 thoracic appendages are modified to serve as additional 

 mouth-organs, and the second and third are slightly differen- 

 tiated from the succeeding ones, being more or less modified 

 for prehension — for these latter the terms first and second 

 qnatliopods are used, the remaining five thoracic limbs being 

 designated as the third, fourth, fifth, sixth, and seventh legs 

 respectively. 



The various joints or segments of the limbs are described 

 in their numerical order as the second (or basal) joint, third, 

 fourth {or merits), fifth (or carpus), sixth (or propodus), and 

 seventh (or dactylus). 



The classification adopted in the arrangement of the various 

 families is that used by Stebbing in his report on the 

 ' Challenger ' Amphipoda, the only differences being that the 

 genus Dairella is placed in a distinct family, as proposed by 

 Vosseler, and the name of the family Tryphgenidse is changed 

 to Lycasidse, as suggested by Sars. 



The collection is the property of the British Museum 

 (Natural History). 



The examination of the specimens has been carried out in 

 the Zoological Laboratories of the University of Manchester, 

 under the direction of Prof. S. J. Hickson, F.R.S., to whom 

 I am indebted for many helpful suggestions. 



I desire also to express my thanks to Dr. W. M. Tattersall 

 for permitting me in the first place to examine the collection, 

 for his continual guidance and encouragement during the 

 preparation of this paper, and for his valuablo assistance in 

 the final revision and arrangement. 



Tribe Hyperiidea. 



Family Vibiliidae. 



Genus VlBlLIA, Milne-Edwards. 



Vibilia propinqua, Stebbing, 1888. 



Vibilia propinqua, Vosseler, 1901. 

 Vibilia propinqua, Stebbing, 1904. 



Locality. Lat. 13° 59' S., long. 34° 35' W., Sept. 9th, 1901 

 (near Bahia), two females. 



