90 STALK-EYED CRUSTACEA. 
and fourth abdominal segments are conspicuously two-ridged; the second 
segment has a pair of small spines on the anterior ridge, and another pair 
nearer the median line on the posterior ridge; the third segment also has a 
pair of spines on the anterior ridge, and in some specimens a third spine in 
the median line on the posterior ridge. The abdominal pleurae are trun- 
cate. The chelipeds are long, very spiny from the proximal end of the merus 
to the base of the fingers; the chief spines of the propodite are on the upper 
margin of the segment; there are two spines near the base of the dactylus. 
The ambulatory appendages are long, setose, and spinose, excepting the dac- 
tylus. None of the legs are furnished with epipodites. A spine over the eye. 
Antenne shorter than the body ; a spine on the outer side of the first seg- 
ment, one on each side of the second and third segments, and one on the 
upper surface of the third segment. 
Length of ovigerous female, 48.5 mm.; length of carapace, 26 mm. ; 
breadth, 15 mm.; rostrum, 8 mm. 
Station 3417. 493 fathoms. 1 male, 2 fem. ovig. 
“3424. 676 a‘ 4 fem. (2 ovig.). 
« 3425. 680 be 7 males, 5 fem. (2 ovig.). 
Munidopsis sericea Fax. 
Plate XIX., Fig. 3, 3. 
Bull. Mus. Comp. Zo6l., XXIV. 184, 1893. 
The whole surface of the body and limbs is covered with a silky pubes- 
cence. The rostrum is long, curved gently upward, convex above, but not 
carinated, armed with a prominent spine on each side near the middle, 
and with three minute spinules near the base. Gastric region swollen, 
armed with two conical spines and ten or twelve small spinoid tubercles. 
The cardiac region has a prominent transverse ridge near the centre, in front 
of which is a deep depression separating it from the gastric region ; the ridge 
is armed with a pair of short spinules. There is a small spine on the anterior 
border between the eye and the antenna, a large one at the antero-external 
angle, three on the border of each anterior branchial lobe (the middle one of 
these three spines is the largest), and one small one on the border of each 
branchial region just behind the posterior branch of the cervical groove ; 
there-are besides about ten spinous tubercles on each branchial area, and five 
or six pairs of spinules on the posterior margin of the carapace. Ptery- 
