32 EEV. T. E. E. STEBBING AND ME. D. EOBEETSON ON 



the third joint rather shorter and narrower than the second, with several spines about 

 the distal two thirds ; the curved finger nearly as long as the third joint, with the dorsal 

 setule not very near the base. 



Triturating organ. One margin fringed with ten graduated spines, which are short 

 and moderately stout, not serrate. 



First gnathopods. The side-plates broad above, so as to project much beyond the 

 upper part of the segment. The first joint broad, not very long, deeply channelled, 

 with some spinules on the front margins, and a group of spines at the hinder apex ; the 

 second joint as broad as long, channelled, with spines along the hind margin ; the third 

 joint much longer than broad, with abovit a dozen spines and half a dozen setee along 

 the serrate hind margin, which is pointed at the apex ; the wrist triangular, distally 

 broader than the length, the front margin convex, with an apical spine, the hinder apex 

 having a graduated series of five spines with several setae; the hand much longer than 

 the wrist and broad, but much longer than broad, with the front margin convex, the 

 hinder concave, armed with two spines, and ending in a long slender tooth, the palm 

 smooth, sinuous, the surface of the hand and the apex of the hind margin having a few 

 setse or spines ; the finger closely fits the palm, except that its tip overlaps the apical 

 tooth. One of this pair of gnathopods was in the specimen rather smaller than the 

 other. 



Second gnathopods. Side-plates longer but narrower than those of the first pair. 



Branchial vesicles broader but a little shorter than the side-plates, apically almost 



pointed. Marsupial plates very narrow, with three setse at the apex. First joint of 



the limb elongate, narrow, a little widened distally; second joint longer than the third 



or hand ; the third joint having much of the convex hind margin furred with setules ; 



the wrist narrow, elongate, about half the length of the first joint, the front and hind 



margins furred with setules ; the hand less than two thirds the length of the wrist, the 



margins nearly parallel, except near the base, both furred with setules, the hind margin 



distally carrying scale-like spinules, the apical margin having the usual spines; the 



finger minute, broad at the base, apically narrow and hooked, the dorsal setule median. 



First per wopods. The side-plates like the preceding pair, but larger. The first joint 



not reaching below the side-plate, with setules along the front margin, and a spine or 



two at the hinder apex; the second joint is armed at three points of the hind margin; 



the third joint at eight points of the hind margin and the produced apex of the front ; 



the fourth joint, much narrower and shorter than the third, has setse at four points of 



the hind margin ; the fifth joint is longer but narrower than the fourth, with setse at two 



or three points ; the finger is slightly curved, a little shorter than the fifth joint. 



Second peraeopods. Tlie side-plates excavate behind to more than half the depth 

 of the plate. The limb similar to the preceding pair, but with the third joint a 

 little shorter. 



Third ferceopods. Side-plates of equal breadth and length, the front margin convex. 



