A SMALL COLLECTION OF AMPHIPODA FROM JUAN FERNANDEZ 



89 



of species and shows variation, having become completely lost in SunanipJiitoe 

 pelagica. The lower lip of A. femorata (fig. 3, B) seems to correspond more 

 to that of 5. pelagica than of A riibricata. In the first (fig. 3, C) and second 

 peraeopoda the basal joint is very broad and has the distal half broader than 

 the proximal, the two portions being separated by a slight constriction. 



Fig. 3. Amphithoe femorata (Kroyer), female. A. Mandible. B. Lower Lip. C. First Peraeopod. 



Jassa falcata (Montagu). 



Cancer {Cammarus) falcatus Montagu, 1888, Trans. Linn. Sec, vol. 9, p. 100, 

 pi. 5. fig. 2. 



Podocerus falcatus Sars, 1894, pi. 212. 



Jassa pulchella and Jassa falcata Stebbing, 1906, pp. 654 and 656. 



Jassa falcata Sexton, 191 1, p. 212. 



Jassa falcata Chilton, 19 12, p. 511. 



Jassa falcata Stebbing, 19 14, p. 371. 



Localities. 



Masatierra, Cumberland Bay, 20 — 25 m. S. P. E, No. 53. Several 

 males. Same locality, »on a buoy», S. P. E. No. 206. Many specimens, males, 

 females and young of all stages. 



