REPORT ON THE SCHIZOPODA. 93 



The telson (see fig. 3) exhibits almost exactly the same structure as in Euphausia 

 gracilis. 



The uropoda (ihid.), ou the other hand, differ essentially as regards the inner plate, 

 which is relatively shorter, scarcely at all exceeding in length the outer, and do not 

 nearly reach the tip of the telson. 



Habitat. — Of this species, too, the collection comprises comparatively numerous 

 specimens, all of which were taken at the surface of the sea. The following is a list of 

 the localities, with the dates at which they were obtained : — 



The distribution of the species would, therefore, seem to be much the same as that of 

 the preceding species, comprising, as it does, the tropical regions of the Atlantic and 

 Pacific Oceans. 



23. Euphausia spinifera, G. 0. Sars (PI. XVI. figs. 9-16). 



Euphausia spinifera, G. 0. Sars, Preliminary Notices on the Challenger Schizopoda, No. 22. 



Specific Characters. — Form of body somewhat robust. Carapace with, a very strong, 

 lateral denticle, placed in a sinus above the inferior margin, a trifle posterior to the 

 middle ; anterior part provided with an elevated crest forming midway an erect denticle ; 

 rostral projection remarkably strong, straight, acuminate ; frontal margin armed with a 

 pair of sharp-pointed supra-orbital spines. Caudal segments with large epimera ; third 

 segment projecting posteriorly as a sharp, mucroniform, dorsal .spine; posterior margin of 

 the two succeeding segments divided into several sharp-pointed laj^pets. Last segment 

 elongate ; preanal spine bidentate. Eyes short and thick. Antennular peduncle with a 

 broad, indented lappet projecting from the basal joint above. Antennal scale oblong- 

 linear, narrowly truncate at apex, outer corner projecting as a well-marked tooth. 

 Telson very slender, with five paii-s of small dorsal denticles ; subapical spines finely 

 denticulate at inner edge. Uropoda much shorter than telson, inner plate extending 

 slightly beyond outer. Length reaching 26 mm. 



Remarks. — This is a very distinct species, and easily recognised by the remarkably 

 strong rostral projection and the spiny armature both of the anterior and posterior 

 divisions of the body. 



