EEPORT ON THE AMPHIPODA. 767 



Pleopods. — Coupling spines as usual miuute, seemingly shaped as iu the other 

 species; a single long cleft spine at the middle of the long first joint of the inner ramus ; 

 in the third pair the inner ramus had but four joints, the outer ramus five. 



Uropods. — Peduncles of the first pair rather longer than the rami, the upper edge 

 pectinate, carrying one or two small spines ; the inner ramus rather shorter than the 

 outer, both with pectinate edges, and without spines ; the second pair like the first, but 

 stouter and shorter, the rami equal ; the peduncles of the third paii- scarcely longer 

 than the proximal part of the ramus, carrying an apical spine ; the ramus pectinate, with 

 an apical spine to the proximal part, which is rather longer than the nail. 



Telson not clearly made out, but probably equal in length to the peduncles of the 

 third uropods, narrow at the apex, the length not equal to twice the greatest breadth. 



Length. — The specimen, in the position figured, measured from the front of the 

 head to the back of the second pleon-segment, one-tenth of an inch. 



Locality. — Station 313, ofi" Cape Virgins, Patagonia, January 20, 1876 ; lat. 

 52° 20' S., long. 69° 39' W.; depth, 55 fathoms; bottom, sand ; bottom temperature^ 

 47°'8. One specimen ; female. 



RemarJcs. — The specific name refers to the shape of the animal with the pleon 

 folded as in the figure, which is probably its ordinary position when at rest. By the 

 narrowness of the first joint in the fourth and fifth per^eopods this species is allied 

 to Metopa nasuta, Boeck, Metopa longimana, Boeck, and Metopa nasutigenes of this 

 Report. 



Metopa compacta, n. sp. (PI. XLV.). 



Lateral lobes of the head a little i>romiuent, postcro-lateral angles of the first three 

 pleon-segments rounded or blunt. 



Lyes round. 



Upper Antenna. — First joint longer than broad, longer than the second ; third 

 joint longer than half the second ; flagellum of ten joints, together shorter than the 

 peduncle, several of them with cylinders longer than the joints ; secondary flagellum 

 minute, two-jointed, about half as long as the short first joint of the primary flagellum, 

 tipped with two setules. 



Lower Antennee very little longer than the upper ; first three joints very short ; 

 fourth joint about as long as the first of the upper antennae, rather longer than the joint 

 which follows, both with several setse upon the surface ; the flagellum short, tapering, 

 consisting of eight joints, together shorter than the flagellum of the ujaper antennae, 

 longer than the fifth joint of their own peduncle. 



Upper Lip broadly and unsymmetrically bilobed. 



