REPORT ON THE AMPHIPODA. 1479 



minute rudiment of a second joint on the fifth perasopods. The specimen in question 

 was labelled "October 5, 1873. South Atlantic, surface, night" ; that is, in lat. 29° l'S., 

 long. 28° 59' W.; surface temperature, 65°"2. In the lower antennas it has the first joint 

 of the flagellum scarcely half as long as the last of the peduncle, and the second joint 

 almost as long as the first. It may perhaps represent a distinct species, or it maj' 

 indicate that parts of the animal are very variable, and that some of the species already 

 established should be united. 



Paratyphis paci/icus, n. sp. 



Head with triangular point below; perseon-segments very short. 



Lower Antennas. — First joint of the flagellum more than half as long as the last of 

 the peduncle, second joint five-sixths of the length of the first. 



Maxillipeds short and broad. 



First Gnathopods nearly as in Paratyphis promontorii, but the lower front angle 

 of the side-plates more acute, the hand nearly as long as the wrist, and the finger 

 more than a third the length of the hand. 



Second Gnathopods. — The wrist rather longer than the third joint, with few spines, 

 the hind margin outdrawn into a little pectinate apex ; the hand rather longer than the 

 wrist. 



First Perseopods. — The first joint sinuous, the third not longer than the fourth. 



Second Perasopods like the first, but considerably longer. 



Third Perasopods. — The side-plates with a very short, blunt, striated process on the 

 inner side. The fourth joint finely pectinate on the front margin, a little shorter than 

 the third ; the fifth joint longer than the third, with a small spinule or tooth at the 

 apex of the slightly convex hind margin ; the finger slender, slightly bent, not a quarter 

 the length of the fifth joint. 



Fourth Perasopods. — The slit on the outer surface of the first joint is shorter than in 

 Paratyphis promontorii, and the third joint has the produced apex blunter, this and the 

 two following joints being shorter than in the species just named. 



Fifth Perasopods. — First joint very thin in texture and transparent, very narrow 

 at both extremities, curved ; the secoud and third joints quite minute, the second 

 almost coalesced with the first. 



Pleopods. — Peduncles produced on the inner side ; coupling spines minute ; the 

 cleft spine with a very slight subapical dilatation of the longer arm ; the joints of the 

 rami from seven to nine in number. 



Uropods. — Peduncles of the first pair pectinate along the outer margin and its 

 apex, about equal in length to the rami, which are equal, reaching nearly to the end of 

 the telson, the outer with strongly pectinate outer margin, the inner with the lower 



