Chilton. — Crustacea of the Kcrmadec hlandx. 



569 



specimens from Victoria and llobait Avliicli I have considered to he L. aus- 

 traUcnsis Dana, and these, though very close to L. yiovne-zealandiae, difE(;r 

 in a few details in the appendages, especially in the male, and until a care- 

 ful compai'ison can be made of specimens from different localities I prefer 

 to keep the two species distinct, and in the meantime to look upon the 

 Kermadec Islands specimens as a local variety of the New Zealand species. 



Trichoniscus kermadecensis sp. nov. Fig. 3. 



Body oblong-oval, greatest breadth about half the lengtli, narrowing 

 somewhat to each end, pleon not abruptly narrower than peraeon. Dorsal 

 surface of head and peraeon scabrous with small spinose tubercles, mostly 

 arranged in transverse lines, a few small ones on segments 3-5 of pleon, but 

 remainder of pleon nearly smooth. 



Head much broader than long, antero-lateral angles a little produced 

 and rounded, frontal margin slightly convex, first segment of peraeon with 

 antero-lateral angles reaching half-way along the lateral margins of the 

 head, posterior margin straight, posterior angles rectangular and slightly 

 rounded ; posterior angles of the second segment similar, those of the third 



to the seventh segments progressively 

 more produced and acute, those of the 

 seventh reaching almost to the end of 

 the epimera of the third segment of the 

 pleon ; third, fourth, and fifth segments 

 of pleon with fairly well-developed and 

 evident epimera, terminal segment tri- 

 angular, posterior margin straight with 

 angles shghtly rounded and bearing 3 or 4 

 minute setules. 



Eyes of three ocelli slightly separated 

 from one another. 



Antennae rather stout, fourth joint of 

 peduncle slightly tuberculated, fifth as 

 long or longer and more slender, its an- 

 terior margin with 3 or 4 spiny tubercles, 

 posterior margin with fine setae, flagellum 

 slightly longer than the last joint of pe- 

 duncle, indistinctly divided into 5 joints, 

 with the usual pencil of long setae at 

 the end. Uropods with basal joints very 

 broad, extending a little beyond the pos- 

 terior segment, outer ramus one and a 

 half times as long as the base, inner ramus about half as long as the outer, 

 its base concealed by the basal joint in dorsal view, both with a fur of fine 

 setae and with a few long setae at the end. 

 Length of body, 4 mm. ; breadth, 2 mm. 



CoZowr.— Greater part of dorsal surface dark brown or almost black, 

 with 2 broad indistinct bands of Hghter markings a Httle to each side of the 

 median line ; some specimens much lighter in colour than others. 



//a6.— Four specimens, labelled " Fresh-water stream, Sunday Island." 

 It is probable, however, that these animals do not habitually live in the 

 water, but in damp moss, &c., on the banks of the stream. 



Fig. 3. — Trichoniscus kermadecensis . 

 Pleon and uropoda. 



