REPOET ON THE SCHIZOPODA. 



101 



opposite directions, both of which, but more particuhirly the outer one, are furnished witli 

 numerous secondary branches beset with reguhir rows of gill-lobules. It should, however, 

 be noted, that the specimen submitted to dissection was not yet full grown, and accord- 

 ingly the gills here figured may be strictly somewhat less complex than in adult animals. 



The caudal linil)s, or pleopoda (fig. 18), do not differ in their structure from those in 

 other Eupliausiidte. 



The telson (see fig. 3) exhibits the usual slender form, tapering gradually toward the 

 apex, which is muc^h produced and drawn out to a very acute point. On examining this 

 point under a high magnifying power, it is found to be armed on either side with two 

 very small secondary teeth (see fig. 3a). Moreover, on the dorsal face of the telson 

 four pairs of small .denticles occur, disposed at regular intervals. The subapical spines 

 project but very slightly beyond the tip of the telson, and are (pxite smooth. 



The uropoda {ibid.) are shorter than the telson, and have the inner plate a trifle 

 longer, but much narrower than the outer. 



The luminous globules agree in every respect, as to number, arrangement, and 

 structure, with those of the genus Eajphausia. 



Habitat. — The specimens of this form collected during the Expedition were taken at 

 the surface of the sea in two different localities : — 



Date. 



August 11 to 12, 1874. 

 August 25, 1874. 



Localit}'. 



Pacific, off Kaudavu, Fiji Islands. 

 West Pacific, Api to Cape York. 



Exclusive of these specimens having the aspect peculiar to the adult animal, the 

 characteristic larval form of this species (to be described further on) has been met wdth 

 in many other localities, showing the distribution of the species to be rather extensive. 

 I annex a list of localities : — 



