568 COLLECTIONS FROM THE AVESTERN INDIAN OCEAN. 



to third segments of the postabdomen have their posterior margins 

 dorsally armed -with a series of minute spinules ; the first segment 

 has a few spinules on the postero-lateral margin above the postero- 

 lateral angle ; in the second segment the spinules are more numerous, 

 and on the third they extend along nearly the whole length of the 

 postero-lateral margins and along part of the infero-lateral margins 

 and (in one specimen) arc of very unequal length ; the fourth seg- 

 ment is dorsally armed on its posterior margin with about five 

 alternately larger and smaller spinules ; there are a few minute 

 spinules on the posterior margin of the fifth segment, and one at the 

 postero-lateral angles of the sixth segment. The telson is double, 

 each of the lobes terminating in a spiuule, above which are several 

 stiff seta). The eyes are large, round, and black. The superior 

 antennae exceed the inferior in length; the antepenultimate pedun- 

 cular joint is rather shorter and stouter than the next joint; the 

 last peduncular joint not longer and scarcely stouter than the first 

 joint of the flagellum ; accessory flagellum about 5-jointed, flagella 

 imperfect. The antepenultimate joint of the inferior antennae is 

 about half the length of the next joint ; second and third joints sub- 

 equal ; flagellum scarcely longer than the third joint. The first pair 

 of legs (gnathopods) are comparatively slender and feeble ; wrist 

 and palm of about equal length and thickness, and palm with a 

 very small and obscure notch in the middle of its distal margin; 

 dactyl about half as long as palm. Second legs with the hands un- 

 equal ; in the smaller (right) leg the wrist is dilated distally where 

 it is applied to the base of the palm, which is oblong-oval in form, 

 with its very oblique distal margin obscurely crenulated and defined 

 by an obscure lobe or tooth ; dactyl not half as long as palm. The 

 larger (left) leg has the wrist posteriorly deeply excavated and 

 distally enlarged to the width of the palm, which is large, massive, 

 nearly oblong in shape, with its distal margin deeply excavated, the 

 notch enclosing a small tooth and followed by a broad truncated and 

 denticulated lobe and by a spine defining the postero-distal angle ; 

 the dactyl is about as long as the distal margin of the palm, and 

 has a blunt subbasal lobe or tooth on its inner margin. The three 

 posterior pairs of legs have the second or basus-joints oblong-oval 

 in shape, and posteriorly produced at the distal extremity into a 

 prominent tooth or lobe, which in the posterior pair is spiniform. 

 The rami of the first three pairs of postabdominal appendages are 

 considerably elongated : the fourth and fifth pairs are biramose, with 

 the rami subequal, styliform, and (like the bases) armed with stiff 

 setae ; in the last pair the rami are subequal and foliaceous, with the 

 margins serrated. Colour (in spirit) reddish. Length of the body 

 nearly 4 lines (8 millim.). 



Seychelles, 4-12 fms. ; two specimens. 



Both are somewhat mutilated ; the description was therefore taken 

 partly from one, partly from the other specimen. 



This species, in the form and dcnticulation of the hand of the 

 larger leg of the second pair, somewhat resembles the Mediterranean 



