200 C- 0. SARS, 



exhibit mucli the same structure, though being perliaps a little luoi-e slender 

 and less coarsely spinous in their outer part. The basal joint of the last pair 

 (fig. 8), as in G. costata, is considerably larger than that of the 2 preceding 

 pairs, and exhibit a similar oblong quadrangular form. 



The 2 anterior pairs of uropoda (fig. 9) are likewise of much the same 

 structure as in that species. 



The last pair of uropoda (fig. 10), on the other hand, do not nearly attain 

 such a large size as in G. costata, though they somewhat project beyond the 

 others. The rami are, as in that species, very unequal, the inner one being 

 very small and scale-like, whereas the outer ramus is well developed and 

 about twice as long as the basal part. This ramus does not, however, ex- 

 hibit such a pronouncedly foliaceous character as in G. costata, being gradu- 

 ally narrowed distally and having the edges fringed with only a restricted 

 number of slender spines and short bristles; at the tip occurs a distinct, 

 thougli rather small terminal joint carrying several delicate bristles. 



The telson (fig. 11) is comparatively small, not extending beyond the 

 basal part of the last pair of uropoda. It is considerably broader than it is 

 long, and divided by a narrow cleft into two obtusely rounded lobes, each 

 armed with several spines (5 — 6 in number), 2 of which issue from the 

 outer edge, the others close together from the tip. 



The adult male (figs. 12 and 13) is considerably larger than the female, 

 attaining a length of 18 mm. 



The form of the body is about as in the female, though, as usual, some- 

 what more compressed, on which cause the body exhibits, in a dorsal view 

 of the animal (fig. 1 3) a very narrow, nearly linear form. 



The antennae (see fig. 12) appear somewhat more elongated, though not 

 nearly attaining Vg of the length of the body, and have a somewhat greater 

 number of articulations in the flagella. 



The gnathopoda (figs. 14, 15) are very strongly developed, and exhibit 

 a structure closely agreeing with that in the preceding species, the propodos 

 being in both pairs very large and of an oblong clavate fonn. 



The last pair of uropoda (fig. 1 6) appear a little larger than in the 

 female, with the outer ramus somewhat more elongated, but otherwise ex- 

 hibit the very same structure. 



This is also the case with the telson (fig. 1 7). 



Colour. — In some of the specimens received short time after having 

 been captured, there was still trace of a darkish pigment arranged in bands 

 across the segments, similar to what occurs in the nearly allied Norwegian 

 fresh-water Amphipod, Pallasiella quadrispinosa. Most of the specimens, 

 however, exhibited a uniform greyish colour. 



^ua.-Mar. cip. 2C0. 22 



