90 MESSES. NOEMAN AND STEBBING ON THB 



The carapace is mapped out into no less than twelve distinct areas above, exclusive of 

 the epimera of the first legs, which, as usual, are folded inwards, covering a portion of 

 the under surface ; second segment divided into three areas, the epimera being distinctly 

 parted off from the central portion. 



Frontal region (n. c) furnished with an acute rostrum of considerable length ; at the 

 base the rostrum widens greatly, spreading out on each side into a semilunar process, 

 the horn and hollow side of which points forward, whilst the arc forms the external 

 margin ; on each side of this the boundary lines of the alar processes slope rapidly 

 backwards, until ultimately the front margin of the carapace juts outwards and 

 forwards into an acute lobe ; behind this, again, another lobe throws out a lateral 

 acute point (n. D. l), while in front the alar process projects considerably and terminates 

 in an acute point ; thus the carapace when viewed from above presents three spine-like 

 processes on each side. 



Second (first free) segment with the forward-directed coxal spine-like process acutely 

 terminated. The remaining segments of the perseon have the epimeral processes, which 

 are produced over the coxse, furnished with a spine on the hinder angle, the three last 

 segments have also a minute spine on the front angle of the epimera, the side of each 

 segment is also armed in front of these epimeral processes with a large outwardly 

 directed spine-like process. The epistoma (n. c. l) is furnished with a long spine, and 

 each of the free segments of the perseon has on the ventral surface two spines on the 

 median line, the anterior of which is very much smaller than the posterior; on the 

 three front segments these spines curve backwards, and on the three last they curve 

 forwards. 



The spine-like lateral processes of the five first segments of the pleon are very large 

 and at nearly right angles to the pleon, ornamented with long plumose hairs, the 

 feathering in many cases, perhaps in all, ending in a sort of lapell or bunch of hairs. 

 The last segment equals in length about four of those preceding, and has the 

 peculiarity of a conspicuous lateral spine on each side, a little in front of the attach- 

 ment of the uropods ; fine slightly plumose hairs also spring from many parts of the 

 surfaces, both dorsal and lateral. On the under surface each of the abdominal segments 

 bears (instead of the usual central spine) a pair of tubercular processes, one on each 

 side of the median line, and just within the bases of the pleopods. 



The upper antennae are wanting, except a fragment of the stout basal joint, on the 

 inner side of which there is a short triangular spine. 



The lower antennae are slender, the articulations short, but of nearly the same 

 relative lengths as in allied forms; the flagellum consists of 9-10 articulations. 



The first gnathopods (n. gn 1 ) have the basos short and broad, its front margin 

 produced about the middle into a curved spine-like tooth ; meros flask-shaped, with 

 the neck adjoining the basos ; wrist narrow, greatly elongated, more than six times as long 



