90 BULLETIN OF THE 



broad. None of the anterior somites are dorsally carinated or toothed, but the 

 sixth, which is nearly twice as long as the fifth and half as high as long, has 

 a thin dorsal carina nearly the whole length. The epimera of all somites are 

 rather small, and the posterior angle is more or less rounded in all. 



The telson is about two thirds as long as the sixth somite, narrowly triangular, 

 thickened at base, with a longitudinal sulcus the whole length above and with 

 a shorter one either side near the base, and with the tip truncated, narrow, 

 and armed with a spine either side and a series of long plumose hairs between. 



The inner lamella of the uropod is a little longer than the sixth somite, 

 lanceolate, and about six times as long as broad. The outer lamella is about 

 a fifth longer than the inner, scarcely wider proportionally, and with the ovate 

 tip prolonged far beyond the sharp spine in which the outer margin terminates. 



In both sexes the protopods of the appendages of the first to the fifth somite 

 are stout and all nearly alike, the outer rami are all very long and slender, and 

 the inner rami of the four posterior pairs are shorter and more slender than the 

 outer. The peculiar sexual appendage of the first pair of appendages in the 

 male is carried as in the last species, and, as in that species, consists of a thin, 

 squarish plate (PL XIV. figs. 13, 14) divided by imperfect articulations into 

 three parts and attached by a constricted base, below which there is a small, 

 broad, oval process (a) ; but the middle of the three parts is as large as the 

 two others combined, inferiorly projects beyond the other parts, and at either 

 side there is an. obtuse tooth, above the outer of which there is an obtuse lobe 

 in the margin and then a deep and narrow notch separating the middle from 

 the inner or distal part, while above the notch on the anterior side there is an 

 oblong process (b) which may be turned either in over the distal part of the 

 plate or out over the middle part ; the distal part is thin, membranous, curls 

 easily over upon the middle part, and is armed along the free edge with minute 

 hooked spines as in the last species. There are two small, lamelliform plates 

 at the base of the inner ramus in the second pair of appendages of the male, as 

 in the last species. 



All the specimens are more or less imperfect, and most of them in very bad 

 condition on account of the softness of the integument and the exceeding 

 fragility of the appendages, so that it is nearly impossible to present a general 

 figure of the whole animal or give accurate measurements. Three specimens, 

 however, give the following approximate measurements in millimeters : — 



Station 



Sex 



Length of carapax including rostrum 



" antennal scale 

 Breadth of " " . 



Length of abdomen . 



" sixth somite of abdomen 

 Height of " " " 



Length of telson .... 



330 



328 



893 



2 • 



? 



9 



9.7 



13.5 



12.5 





6.4 



6.8 





2.5 



2.7 



20.0 



27.0 



27.0 



5.0 



6.2 



6.7 



2.5 



3.5 



3.2 

 5.0 



