REPORT ON THE SCHIZOPODA. 95 



The structure of the maxillipeds and the legs, as also that of the gills, would seem 

 not to differ essentially from that observed in the other species of the genus. 



The coijulatory appendages to the two first pairs of pleopoda in the male (see figs. 1 4, 

 15) are in every respect normal in structure, although certain slight specific difi'erences 

 can indeed be found b}" comparing them with those parts in other species. 



The telson (see fig. 11) is very slender and elongate, attaining the length of the two 

 preceding segments taken together, and exhibits no less than five pairs of minute dorsal 

 denticles. The subapical spines are of moderate size, reaching but slightly beyond the 

 lanceolate tip of the telson, and have theu- inner edge finely denticulate. 



The uropoda (ibid.) are much shorter than the telson, and have the inner plate 

 very narrow and only slightly overreaching the outer. 



Habitat. — The four specimens procured, three of which have been mounted in 

 glycerine on glass slides, were taken at the surface of the sea, in the following 

 localities :— 



The distribution of this species as yet known, would accordingly seem to comprise the 

 southern part of the Pacific Ocean. 



24. Euphausia latifrons, G. 0. Sars (PI. XYI. figs. 17-23). 



Euphausia lafifrons, G. O. Sars, Preliminary Notices on the Challenger Schizopoda, No. 23. 



Specific Cliaracters. — Form of body rather short. Carapace without any lateral 

 denticle ; rostral projection very peculiar in shape, forming, as it docs, a broad, quadrate 

 plate abruptly truncate at the apex. Caudal segments smooth above, with comparatively 

 small, rounded epimera. Last segment longer than preceding, and jutting out at the 

 end dorsally as a short dentiform projection; preanal spine small, unguiform. Eyes 

 clavate, cornea but slightly expanded. Antennular peduncle with a short serrate lobe 

 extending from the basal joint above. Antennal scale subovate, apex rounded, outer 

 corner armed with a distinct tooth. Telson with three pairs of dorsal denticles, subapical 

 spines serrate along the inner edges. Inner plate of uropoda reaching slightly beyond 

 outer. Length scarcely exceeding 8 mm. 



Remarks. — The small size of this animal, in conjunction with the peculiar shape of 

 the frontal plate, induced me at first to regard it merely as a larval stage of some other 



