430 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. ANCHYLOMERIDJE. 



Phrosina semilunata. 



The second pair of maxillce (PI. XVIII, fig. 15) have the principal lamina very 

 small, and sparingly set with fine hairs. The secondary lamina is much longer, with a 

 few short hairs at the apex. 



The maxillipeds (PI. XVIII, fig. 16) have a very short, almost linear, basal portion. 

 The lateral laminae are elongate-lanceolate, with a few short hairs on the inner margin. 

 The median lobe is short, rounded at the apex, and provided with minute hairs. 



The perceopoda are much more slender in the younger specimens than in the adult 

 ones, and a little more slender in the male than in the female. 



The uropoda are narrower in the young than in the adult, and angular at the 

 apex in very young individuals. 



2. PHROSINA PACIFICA, TH. STEBBING, 1888. 



Syn. 1888. Phrosina pacifica, TH. STEBBING. »Keport on the Amphipoda». Voy. of H. 



M. S. Challenger. Zoology. Vol. 29, 

 p. 1430. 



Stebbing says that the skin of this species »appears to be studded with numerous 

 minute hairs». 



For a nearer knowledge of this species I refer the reader to Stebbing's work. 



