218 Amphipoda and Isopoda 



ischium, merus, and carpus, similar to those on the inferior 

 antenna?. 



Fifth to seventh pairs of legs similar in structure to the fourth, but 

 successively longer, so that the seventh pair of legs extend consider- 

 ably beyond the telson and up to about the level of the posterior 

 margin of the pleopods ; fifth pair of legs with the propodus slightly 

 less than the merus and carpus combined, and the latter longer than 

 the merus ; sixth pair of legs with the carpus one and a half times as 

 long as the merus, and only one-seventh less than the propodus ; 

 seventh pair of legs with the carpus but very little less than the 

 propodus, and still one and a half times as long as the merus. 



Pleopods wholly uncovered by the telson, with the lamella} of all 

 five pairs narrowly oval in shape, and all setose on both margins, 

 including the inner lamella? of the first pair. 



Telson (Plate V., Fig. 1) quite small, little more than twice as 

 long as the last segment of the metasome, and about as broad at its 

 base as long, linguiform in shape, truncate at the apex, its margins 

 suddenly narrowing at about one-third of the length of the whole 

 telson, unarmed. 



Uropods (Plate V., Fig. 1) uniramous, consisting of a single 

 basal joint articulated ventrally to the telson, and about two-thirds as 

 long as the latter, and a terminal very stout and very long stiff 

 spinous seta, 11 millimetres in length, and ornamented along the 

 posterior three-quarters of its length with numerous long fine plumose 

 seta?. 



Length of the single specimen, 18 millimetres from the head to 

 the tip of the telson, 29 millimetres from the head to the tip of the 

 uropods ; inferior antenna?, 22 millimetres long. 



I am unable to determine the sex of the type specimen. No 

 incubatory lamella? could be detected, nor, on the other hand, could 

 any trace of appendage be found on the inner lamella? of the second 

 pleopod. 



The structure of the telson and uropods, and the exceedingly long 

 inferior antenna?, with its beautiful decoration of delicate plumose seta?, 



