265 
the rest of the carapace. Anterior to these spines the front is 
depressed, triangular, acute at the apex, each side having 
tliree strong spines, including the supra-ocular, which is large. 
The interocular sj)ace is more than one-fourtli the width of 
the carapace. 
The lateral margins of the carapace are strongly cristate 
anteriorly, furnished witli eigiit spines, including the post- 
ocular : tnese have often a few spinules between them ; these 
spines occupy about three-fifths the length of the lateral l)or- 
der, the postero-lateral remaining portion of which is rounded 
and marked with some oblique rugae. The posterior border is 
strongly insinuate. 
Tile pterygostomial region has a very strong oblique 
ridge, reaching well behind. 
The pleon is broad, the segments marked with trans- 
verse, sli^'htly elevated areas, coarsely hairy. The sixth seg- 
ment is longer than the preceding ones and narrower, the 
lateral margins being deeply excavated to receive the ped- 
uncles of the uropods. The telson is composed of five plates, 
viz., one large, median, and triangular, two elongate and 
lateral, and two terminal ovate, with peduncle-like constric- 
tions, and fringed with long, jDlumose set?e. 
The eyes are moderately large, on short peduncles. 
The basal joint of the antennule is strongly spined dis- 
tallv, as in (Talathea. 
Three joints of the antennal peduncle are distinct, the 
first of these is very short, and anteriorly bears a prominence 
tipped with two or three spines, the second, which is also 
short, is prominent in front, with one spine and a few spin- 
ules, the third, though scarcely shorter, is cylindrica' : the 
flagellum is about as long as the chelipeds. 
In the external maxillipeds the ischium is moderately 
broad, produced at the internal distal angle, and the margin 
broadly rounded and minutely crenulated, also a little pro- 
duced at the external distal angle. The merus has the in- 
ternal lobe only very slightly projecting, above it is a spine, 
and at the distal end a smaller one. The carpus has two 
longitudinal ridges on its upper surface, and is a little lobed 
internally and deeply hollowed below, to receive the process of 
the following joint. The propodus is much lobed internally, 
the lobe being hatchet-shaped. The joints bear the usual 
long, plumose setae. The exopod is rather slender, reaching 
about half the length of the merus ; it bears a few coarse 
granules on its outer border. 
The chelipeds are long, well developed, very spinose to 
tuberculate. The merus joint reaches slightly beyond the 
level of the eyes, and is somewhat compressed, with two small 
