147 
According to this classification the genus Angasia would 
come in between the genera Latreutes and Hippolyte, for in 
it the mandible is without appendage, and the carpus of the 
second pereiopod is three-jointed, a like condition to what 
obtains in Latreutes, and the question would arise: Why 
not unite the two genera? The reply must be that they 
differ sufficiently in other respects to warrant the separa- 
tion. 
There is no doubt that the family greatly requires revision, 
and if the addition of a few more species renders this more 
imperative, good will be accomplished. 
Sub-order, MACRURA. 
Tribe, CARIDEA. 
Family, Нтррогутірж. (Legion, POLYCARPINEA.) 
Genus Angasia, White. 
Body usually elongate. 
Carapace without a spine on the gastric region, and with- 
out supra-orbital spines. 
The rostrum usually is very long, laterally ridged, pointed 
rigid, tapering, and strongly keeled below, with spines only 
on the under side. 
The antennules are much shorter than the rostrum, and 
usually shorter than the antennal scales. 
The antennal scales also are shorter than the rostrum, 
long, narrow, robust, regularly tapering to a terminal spine. 
The mandibles consist only of the molar process. 
The third maxillipeds are short, spatuliform, with the ter- 
minal joint short, and strongly spined on its anterior border 
without exopod. 
The second pereiopods have a triarticulate carpus. 
The branchiæ are five. 
This genus differs from Latreutes, in the more elongate 
form, the shape of the rostrum, in the Shape and propor- 
tionate length of the joints of the third maxillpeds, and in 
the proportionate lengths of the carpal joints of the second 
pereiopods, and in the pleura of the pleon and other minor 
characters. 
Angasia elongata, n. sp. Pl. xxvii, figs. 1-4. 
Body very elongate, narrow in the vertical direction, espe- 
cially anteriorly, and laterally compressed. 
Carapace more than one-third the length of the body, ex- 
clusive of rostrum and telson, about as long as the first four 
segments of the pleon, smooth, not markedly depressed an- 
teriorly, its anterior margins have rather long subocular 
spines with slight lobes just above them, the external angles 
