268 MR. G. M. THOMSON OK THE OCCTJERENCE OF 



The iBner brancli is a 1-jointed plate-like lamella, nearly as long 

 as the outer, and fringed with long setse on the inner margin and 

 round the extremity. 



The uropoda (fig. 25) are twice as long as the last abdominal 

 segment and are 2-branched ; on their inner edge they bear a 

 line of fine setae. The outer branch o£ each is 2-jointed, but 

 only indistinctly so ; the fir^t joint is very short ; the second 

 is long, acutely lanceolate in form, and bears a row of fine 

 setae along the inner margin. The inner branch is l-jointed, 

 shorter than the outer, acutely tapering in form, and bears on 

 its inner edge a row of setae which gradually pass into short 

 spines. 



Sabiiat. Bay of Islands, taken with the dredge in 8 fathoms ; 

 Otago Harbour (Dunedin), a few very immature specimens taken 

 with a surface-net. 



DiASTTLis NEO-zEALANicA, n. sp. (Plate XVIII. figs. 1-11). 



Specific Characters. (Female.) — Carapace slightly compressed, 

 scarcely narrowed behind, arched above, about twice as long as 

 rest of body ; surface quite smooth, destitute of spines ; pseudo- 

 rostral projection conical, somewhat arched above. No eye ? 

 Telson conical, spinous on both sides. Uropoda with the scape 

 about twice as long as telson, slender; branches subequal, about 

 half as long as scape, 3-jointed ; inner branch with the joints 

 subequal, outer wath the terminal joint exceeding the two 

 proximal. 



Length of largest specimen 8 millim. 



The carapace is not quite twice as long as the exposed part 

 of the trunk ; its width is only slightly diminished in the pos- 

 terior portion, while the first exposed joints of the hind part of 

 the body are very narrow. It is somewhat distinctly 6-jointed, 

 and when seen from the side (PI. XVIII. fig. 1) it has, espe- 

 cially in the front portion, a sinuous outline, while the pseudo- 

 rostral projection is somewhat arched above and produced into 

 a short conical beak. In the dorsal aspect (fig. 2) the carapace 

 is seen to be aSeutely pointed, the rostrum appearing like a 

 cone. 



The tail is somewhat longer than the anterior part of the body, 

 and is laterally flattened ; each segment is produced backwards 

 on the lateral line into a blunt projection. The relative lengths 

 of these segments in the dorsal line are as follow^s : — 



