EUPHAUSIACEA AND MYSIDACEA. 
By Walter M. Tattersall, D.Sc., Keeper of the Manchester Museum. 
With Plate XVIII. 
Through the courtesy of Professor Haswell I have had the opportunity of examining 
the Crustacea belonging to the old order Schizopoda, collected during the course of 
the Australian Antarctic Expedition under the leadership of Sir Douglas Mawson. 
The expedition explored that part of the Antarctic continent and adjacent 
ocean which lies between Kaiser Wilhelm II Land (the head-quarters of the German 
Expedition) and Victoria Land (the head-quarters of the British Expeditions), i.e., 
between 90° E. long, and 170 c E. long. 
Of the numerous recent expeditions to the Antarctic, the French, Belgian, 
Swedish, German, Scotch, and English have already published reports on the orders 
of Crustacea here dealt with, and as these expeditions between them cover the entire 
Antarctic Ocean, our knowledge of the Schizopodan Fauna of these waters is now 
considerable. It was, therefore, not to be expected that the present collection would 
be rich in novelties, and indeed such is the case. The collection is a small one, com¬ 
prising four species of Euphausians, and two of Mysids. One species of Mysid is new 
to science, but it is not an Antarctic species, having been collected in the Auckland 
Islands. The other five species are well known Antarctic and Sub-Antarctic species 
which have been reported by all the recent South Polar Expeditions. 
The new species belongs to a genus described in 1900 by Mr. G. M. Thomson, 
from specimens collected in New Zealand waters. Since that date it does not appear 
to have been met with. The discovery of a second species by the “ Aurora,” is, therefore, 
a matter of some interest. 
I wish to express my thanks to Professor Haswell for his kindness in entrusting 
this collection to me for examination and report. 
