PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 447 



two outer are large, dentiforin, and have a spinule between them, while 

 the terminal or inner spines are smaller, slender, and movable, and scj)- 

 arated from the large lateral spines by a space armed with three or four 

 spinules, while the margin between the movable spines forms an obtuse, 

 re-entering angle, each side of which is armed with a close-set series of 

 seven to ten slender spinules. 



The eyes are large, as broad as the rostral plate, and black. The 

 antenna! scale is narrowly elliptical, about three times as long as broad, 

 and the margins ciliated. The prehensile edge of the dactylus of the 

 large " raptorial limbs " (second maxdlipeds) is armed with ten slender 

 spines, which decrease in length distally. The bases in each of the 

 three posterior pairs of thoracic legs are armed on the outer side with a 

 conspicuous, acute, and somewhat hooked spine, projecting over the 

 articulation of the next segment. The appendages of the antipenulti- 

 mate segments of the three posterior pairs of thoracic legs are lamellar 

 and broadly elliptical, though those of the anterior pair are a little 

 shorter and those of the posterior pair slightly narrower than the others. 

 The base of the uropods is armed above with a spinulose crest, running 

 from the base to the articulation of the outer ramus, and at the distal 

 end below with two dentiform spines as long as the inner ramus, below 

 the articulation of which there is another but much smaller spine on the 

 base. The proximal segment of the outer ramus is crested above, the 

 distal part of the outer edge is armed with a crowded series of stout, 

 spiniform setse, and the lamellar terminal segment is elliptical, nearly as 

 long as the base, and has its edges ciliated. The inner ramus is much 

 longer and narrower than the terminal segment of the outer ramus, 

 which in other respects it resembles. 



Measuremenis. 



Length 



L«ns h of carapax along median line, excluding rostrum . 



Breadth of carapax at anterior margin " 



Great I'st 1 irradtli of carapax 



Length of rostral plate 



Breadth of rostral plate '. ". . . 



Greatest breadth of abdomen 



Length of telson 



Breadth of telson 



Station 805, Go fathoms (one male) ; 87G, 120 fathoms (one somewhat 

 mutilated female, from the stomach of Lopholatilus). 



AMPHIPODA. 



Stegocephalus ampulla Bell. 



One specimen from station 895 ; 238 fathoms. 



Epimeria loricata G. O. Sars, Arcliiv for Mathem. Naturv^idenskab, Kiistiania, iv, p. 



450, 1879. 



Stations 809 to 871, 879, 880, 893 to 895 ; 115 to 372 fathoms. Abun- 

 dant at 809, 192 fathoms, and 894, 305 fathoms. Sars's specimens were 



