Xu'ilOLLS — yrv' (iriiHs <111(1 Sjircirs of A mphipods. 
107 
U. setosa sj). nov. (PI. XIT, 1-0 a d PI. XIIP Figs. 7-9). 
Sp('('i/ic dia</no,sif <: — Sognieiils of tlio unis witli a few delieaP* 
scTae. Kyes alisent. Auteima 1 ratlier less than lialf the length 
of the body. Aiiteiiiiao d very stout: in tlie male almost pediform, 
extremely setose; moderate in the female; guatho])od 2 iimeh larger 
than giiathopod 1 in the male and, to a h'ss-^r ilegree, in the 
female; without sjiiuous rows on siHumd joint but very setose on 
next four joints; earjuis triangular with distal lobe well developed, 
|ro])od oval, palm shorter and less obliipie than in T wesfralis 
with irregular lobing little develojied. Uro])o I ‘5, with basal join’’ 
broad, outer ramus moderately elongated, two-jointed; the ju'oxi- 
mal joint bearing, in the male, a narrow flange-like expansion 
set witli long setules. Telson as wide as long, cleft slightly more 
than half its length. 
Lcnplh . — All nuicli eui ved but, measure ' along the mid*dorsai 
line, largest male, 9 mm., largest female, 7.d mm. 
Coinin '. — In life, grayish green: in s]>irit, <lull brown. 
//u/u'/u/.— Amongst Chora ,^p. growing n >av edge of a large 
leservoir at Ixatanning. Fighteen sjiecimens were taken, 
of whieli four were females with well develo})ed lirood 
]iou('h ; one large ami eight smaller males; five were 
immature. 
iJctaiIrd dr.srr?ydto/i -The first a itenna is slightly stouter in 
the mnh' than in the female, having a flage’bim (2(i joints in tin- 
large male ('xainincMl) the lenoth of tlie jiedumde; in the 
female, the flagellum (24 joints) is exactly double the length of 
tlie peduncle but in neither is it very setose. The accessory 
flagellum, in lioth sexes, is 4-jointod. anil (M|nals in length, a})])roxl- 
mately, the first four articles of the ])rimary flagellum. 
The second antenna is, in tin* female, (PI. XII, Pig. 2) 
markedly setose; in the male (Pi. Xli, i'i:'. 1) it is extremely so; 
in the latter, also, it is very much stou'.r than in the female 
and the flagellum (of ten joints) is distinctly shorter than the 
combined length of tlie two more dist'il joints of the peduncle. 
The width of the second joint of the p''duiicle is e<pial almost to 
half the length of the ilagelhu:]. Prom a ('ompavison with the 
figures given by Philton of U. wc-^tmlia it will lie evident that 
the flagellum in that s])ecies is, relatively, even shorter still. In 
the f(unale the two more distal joiiPs of the pedunede (whicli 
is not dis])roportionately stout) a.re scarcely longer tluin the 
