60 Chas. Chilton. 
Leucothoe spiniearpa (Abildgaard). 
L. antarctica PFEFFER 18SS, p. 125, pl. 2, fig. 4. 
spinicarpa STEBBING 1906, p. 165. 
WALKER 1907, p. 18. 
" STEBBING 1910, p. 550 and 630, 
e 4 CHILTON 1912, p. 478. 
I agree with WALKER in considering the Antaretic specimens 
speeifically identical with those from northern and other seas, so that 
this species is to be looked upon as another of the Amphipoda of cos- 
mopolitan distribution. I have carefully compared a specimen of PFEFFER’S 
species with some from South Vietoria Land and with European specimens 
and have failed to find any differences of specific importance. PFEFFER 
had himself drawn attention to the close resemblane of his species to the 
northern L. articulosa MONTAGU, a form now considered the same as 
L. spinicarpa (ABILDG.). It is probable that some of the species now 
known under different names from Australia and New Zealand will prove 
also to belong to L. spinicarpa. References to these will be found in the 
works quoted. The species appears to be abundant both in Arctic and 
in Antarctic seas. 
Jassa falcata (Montagu). 
Podocerus ingens PFEFFER 18SS, p. 131, pl. 3, fie. 1. 
Jassa pulchella STEBBING 1906, p. 654. 
‚ wandelt CHEVREUX 1906, p. 94, fig. 54—56. 
Hemijassa goniamera WALKER 1907, p. 61, pl. 11, figs. 9S—106 A. 
Jassa falcata E. W. SEXTON 1911, p. 212. 
UHILTON 1912, p. 511. 
This is another Amphipod of cosmopolitan distribution and owing to 
the fact that there are at least two forms of the adult male both 
differing from the female the number of names given by the different 
authors to the species is very great; the most important of them can be 
traced from the references given above. Much work at the elucidation 
of the life history of this species has already been done by Mrs. E. W. 
SEXTON and her researches are being continued at the Marine Labora- 
tory, Plymouth. She has been good enough to examine PFEFFER’S 
specimens from South Georgia and those obtained by the „Scotia“ Ex- 
pedition from South Orkneys and agrees with me that the majority of 
them are specifically the same as the European specimens. PFEFFER’S 
actual type is a male of large size, 26 mm in length, and in the second 
gnathopod shows some points that do not appear to be represented in 
any of the smaller specimens so that it is doubtful whether this is the 
same species as the smaller speeimens, Mrs. SEXTON being inelined to 
