A SMALL COLLECTION OF AMPHIPODA FROM JUAN FERNANDEZ 89 
of species and shows variation, having become completely lost in Suxamphitoe 
pelagica. The lower lip of A. femorata (fig. 3, B) seems to correspond more 
to that of S. pelagrca than of A rudbricata. 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. 

A 
Fig. 3. Amphithoe femorata (Kroyer), female. A, Mandible. B, Lower Lip. C. First Peraeopod. 
Jassa falcata (Montagu). 
Cancer (Cammarus) falcatus Montagu, 1888, Trans. Linn. Soc., vol. 9, p. 100, 
Pleeas: ig. (:2. 
Podocerus falcatus Sars, 1894, pl. 212. 
Fassa pulchella and Fassa falcata Stebbing, 1906, pp. 654 and 656. 
Fassa falcata Sexton, 1911, p. 212. 
Fassa falcata Chilton, 1912, p. 511. 
Fassa falcata Stebbing, 1914, 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. 
