corners not produced at the tip, and the anterior edges nearly straight. First 

 pair of coxal plates small and almost covered by the 2nd; 4th pair 

 much broader than the 3rd, and somewhat expanded distally, inferior part 

 broadly truncated; the 3 posterior pairs very small. Last pair of epimeral 

 plates of metasome angularly produced at the lateral corners. Urosome rather 

 massive, with the last segment comparatively large and convex above. Eyes 

 quite rudimentary, being replaced on each side by a small patch of an opaque 

 whitish pigment, without any trace of visual elements. Superior antennae 

 with the peduncle rather thick and having the 1st joint much longer than 

 the other 2 combined, flagellum not attaining the length of the peduncle, and 

 composed of 5 articulations ; accessory appendage small, biarticulate. Inferior 

 antennae with the flagellum much shorter than the peduncle, and composed of 

 4 articulations only. Anterior gnathopoda with the propodos longer than the 

 carpus, its inferior edge finely serrulated, and, moreover, armed with 2 short, 

 widely separated denticles. Posterior gnathopoda comparatively less slender and 

 less hirsute than in A. >?e#fcff^ propodos exceeding half the length of the carpus, 

 and somewhat dilated in its proximal part. Pereiopoda not very much elong- 

 ated, basal joint of last pair about the length of the remaining part of the 

 leg, and somewhat narrowed distally. Last pair of uropoda with the rami 

 comparatively short, the outer one with the basal joint very sharply defined 

 from the spiniform terminal joint, inner ramus mucroniform and a little shorter 

 than the outer. Telson short and broad, cleft very narrow and extending 

 nearly to the base, terminal lobes obtusely rounded, and each armed with a 

 single small apical denticle. Body semipellucid, of a yellowish hue; ova in 

 the marsupial pouch dark violet, Length of adult female 3 mm. 



Remarks. This new species is at once distinguished from A. neglectus 

 by the small and imperfectly developed eyes. It is also of a very inferior size, 

 and, moreover, exhibits well-marked differences in the structure of the several 

 appendages. 



Occ/in-t nee. I have only seen a few specimens of this form, which 

 were collected from very deep water, partly in the Trondhjemsfjord, partly 

 off the Nordland coast. Also among some Amphipoda sent me by Mr. Schneider 

 and collected by him in the neigbourhood of Tromse, a single specimen of 

 this form occurred. 



Arlstias megalops, G. 0. Sars, n. sp. 



(Suppl. PI. II, fig. 1). 



Body comparatively more slender than in the preceding species, and 

 not nearly so tumid in its anterior part. Cephalon comparatively larger, 



