GLYPHOCRANGON SICARIA. 145 
is unarmed with spines, but is broken into two tubercles, the posterior of 
which is the more prominent. In the triangular area between this carina and 
the gastro-hepatic sulcus are several small tubercles disposed for the most 
part in single row. The gastric region is free from tubercles in the median 
line, barring a minute one at the anterior boundary near the base of the 
rostrum. But on either side, this region is ornamented with tubercles ; these 
are not spinous, nor do they tend to form very well-marked carine. On the 
branchial regions there are three carine on each side ; the uppermost of these 
is broken up into five or six tubercles; the tops of these tubercles, as well as 
of the other carinz on the branchial and the hepatic areas, exhibit a coroded 
surface, and a similar appearance is manifest on the whole lower surface of 
the carapace where it is bent beneath the thorax. 
The abdomen is irregularly bestrewn with low tubercles, which, as com- 
monly in this genus, take on the form of a low interrupted keel along the 
median line. The lower margins of the second to the fifth segments are 
armed with two spines, the posterior of which is the smaller on the second, 
third, and fourth, but the larger on the fifth segment. The sixth segment 
is armed with a single spine on each side, at the postero-lateral angle. The 
telson is straight and much shorter than the rostrum ; it is furnished with a 
small laterally compressed tooth in the median dorsal line at the base, and 
both the dorsal carinee and the lateral margins are obsoletely dentate along 
their basal half. 
The eyes are rather small, and their pigment is apparently not so dark as 
in most species of this genus. 
The antennal scale is about one half as long as the rostrum, oval, ciliated 
on the border, but not furnished with any spinules except the small one on 
the outer border. 
The dactyli of the three posterior pairs of legs are lanceolate. 
The posterior pair of abdominal appendages are shorter than the telson ; 
both the dorsal and ventral faces of these appendages are free from spines or 
tubercles. 
Length, 124 mm.; length of rostrum from tip to anterior gastric groove, 
30.5 mm. ; length of carapace, including rostrum, 58 mm. ; length of telson, 
20 mm.; length of antennal scale, 13 mm.; breadth of antennal scale, 
7.5 mm. 
Station 3382. 1793 fathoms. 2 specimens. 
This species is nearly related to the preceding (G. nobilis). It differs 
19 
