70 Gr. M. Giles — Descriptions of new Indian AmpMjpods. [No. 1, 



nearly spherical, and exceeds a good deal in length either of the remain- 

 ing two pieces, of which the distal is somewhat the smaller. The flagel- 

 lum is composed of 12 or 14 short articuli, and its appendage, which is 

 about half its length, of a smaller number of slighter, but otherwise 

 closely similar, pieces. 



The antenna is slighter but somewhat longer than the antennule. 

 In the female, the flagellum but little exceeds that of the antennule, 

 but, in the male, it often forms a lash of considerable, but variable, 

 length. 



The gnathites are small and feebly armed, the mandibles having 

 but a simple chisel-like cutting plate, and a two-jointed appendage, 

 and the maxillepedes being small and not pediform. 



The first of the gnathojpods is short, stoat, and subchelate, the palm 

 being but somewhat oblique and the dactylopodite short and strong. 

 The second is much longer than the first, but is very slender. Its 

 propodite resembles that of the first in general outlines, but the 

 dactylopodite is so small that it might easily be overlooked, forming 

 only a small extremely hooked claw projecting from the middle of the 

 distal extremity of the propodite. It was only, however, after a re- 

 peated and very troublesome examination that I succeeded in getting a 

 clearly uninjured specimen of the appendage to project beyond the coxal 

 plates. In length the second gnathopod almost equals the first six seg- 

 ments of the thorax. 



The fourth and fifth thoracic appendages are subequal to each other, 

 but shorter and slenderer than any of the other appendages ; they 

 are quite of the usual ambulatory type. The sixth, seventh, and eighth 

 closely resemble each other in form, but differ considerably in length, 

 all three having the posterior border of their basipodites provided with 

 very broad and strong buttress-like plates, and the remaining articula- 

 tions broad and strong ; while, however, the eighth is as long as the 

 head and thorax, the seventh is about two-thirds and the sixth a little 

 over one-half this length. 



The first three abdominal appendages are of medium size and of 

 the usual type. The last three are biramous, the rami of each being 

 equal. The fourth is much larger than the fifth, the sixth still smaller, 

 the entire length of the last only equalling that of the propodite of 

 the fourth. 



Parapleustes pictus, n. sp., PL II, Fig. 6. 



This species appears to answer best to the genus Parapleustes pro- 

 posed by Buchholz (Zweite deutsche nord polar Fahrt, 1866 — 1870, p. 

 337) for a species (much resembling the present) which was dredged off 



