90 STALK-EYED CRUSTACEA. 



and fourth abdominal segments are consjjicuously two-ridged ; the second 

 seo-ment 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. 

 Antennae 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 fern. ovig. 

 " 3424. 676 " 4 fern. (2 ovig.). 



" 3425. 680 " 7 males, 5 fem. (2 ovig.). 



Munidopsis sericea Fax. 

 Phte XIX., Fig. 3, 3\ 



BuU. Mus. Comp. Zool., 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- 



