gO Chas. Chilton. 



Leueothoe spinicarpa (Abildgaard). 



/.. antarctica PFEFFEE 18S8, p. 12s, pl. 2, fig. 4. 

 .. spinicarya Stebbing 1906, p. 1G5. 

 VVALKEB 1907, p. IS. 



Stebbing 1910, p. 580 and 630. 

 Chilton 1912, p. 478. 



I agree witli Walker in considering the Antarctic specimens 

 specifically identical witli those from northern and other seas, so that 

 tliis species is to be looked lipon as another of the Amphipoda of cos- 

 mopolitan distribution. I have carefully compared a specimen of PFEFFER's 

 species witli soine from South Victoria Land and witli 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. artiadosa MONTAGU, a form now considered the same as 

 L. spinicarpa (ABILDG.). It is probable that some of the species now 

 known under ditferent 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 1SS8, p. 131, pl. 3, fig. 1. 

 Jassa pulchetta Stebbing 1906, p. 654. 



wandelt Chevreux 1906, p. 94, fig. 54— 56. 

 Hemijassa goniamera Walker 1907, p. 61, pl. 11, figs. 98 — 106 A. 

 Jassa falcata E. W. SEXTON 1911, p. 212. 

 Chilton 1912, p. 511. 



Tliis is another Amphipod of cosmopolitan distribution and owing to 

 the fact that there are at least two forras of the adult male both 

 diit'ering 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 tliis species has already been done by Mrs. E. W. 

 SEXTON and her researches are being continiied at the Marine Labora- 

 tory, Plymouth. 8he has been good enough to examine Pfeffkh's 

 specimens from South Georgia and those obtained by the „Scotia" Ex- 

 pedition from South Orkneys and agrees with nie 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 specimens. 3lrs. SEXTON being inclined to 



