REPORT ON THR SCHIZOPODA. 37 



are somewhat shorter, but, in other respects, of very similar a[)pearance. As in 

 Gnathophausia ingens, two distinctly elevated lines may be observed a short distance 

 within the posterior margin of the carapace, running parallel to the edge. The rostrum 

 is strongly developed, and rather produced, in the smaller specimen (fig. 3) being about as 

 long as the carapace, in the larger (figs. 1, 2) somewhat shorter. It extends, as usual, 

 horizontally, and is three-edged and distinctly denticulate throughout, terminating in a 

 sharp point. The supra-orbital spines would seem to be wanting, or at least are very 

 inconspicuous, the slight projections seen at the base of the rostrum (fig. 3, a) being 

 simply a pair of the lateral rostral denticles placed at some distance posterior to the 

 others. On the other hand, the antennal spines (6) are very distinctly marked, and the 

 branchiostegal spines (c) distinguished by very considerable size, jutting out on either 

 side as a pair of strong, denticulated processes. 



All the caudal segments exhibit, at some distance from the posterior margin, a 

 rather deep transverse impression, and, in addition to this characteristic, are very shai-ph' 

 defined, the one from the other. As in Gnathophausia ingens, both lappets of the 

 epimera are acutely pointed and somewhat produced, the anterior being a trifle smaller 

 than the posterior. The epimeral spines of the last segment (see fig. 6) in this species 

 are also partly connected on the ventral face, and are rather smaller than in the tw^o 

 preceding species, the terminal indentation between their outer parts being also shorter 

 and broader. 



The eyes (see figs. 1, 2, 4) are slightly dilated toward the apex, almost clavate in 

 form, the cornea being more expanded than in the preceding species. 



The outer flagoUum of the antennulse (see figs. 1, 2) is remarkably strong, and about 

 equal in length to the whole body, the rostrum excepted. 



The antennal scale (see figs. 4, a, 5) is comparatively very small, and ovate in form, 

 somewhat resembling that of Gnathophausia ingens. Its apex, however, is here obliquely 

 truncate, not emarginate, and the inner corner is rather more prominent than in that 

 species. The outer edge exhibits in its distal part five or six somewhat unequal and 

 rather small teeth, and the inner setigerous edge is more evenly curved than in 

 Gnathophausia ingens. 



The oral parts (see fig. 4), the legs, and the caudal limbs would seem on the whole 

 to agree perfectly with the same parts in the two preceding species, save, perhaps, that the 

 legs are somewhat more robust in form and less elongate. 



The telson (see fig. 7), as in the two preceding species, is very large and massive, about 

 equalling in length the three preceding segments taken together, and it gradually tapers 

 toward the apex, the lateral edges being evenly arched, and armed with a large number 

 of small spinules. The two apical spines, connected as usual in the middle, form a com- 

 paratively regular crescent-shaped projection, finely serrate at the bottom of the posterior 

 emargination, and, moreover, exhibiting on the upper face a row of small denticles. 



