“ TERRA NOVA ” EXPEDITION. 
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19. Diastylis neozealanica, G-. M. Thomson. Fig. 6. 
I). neo-zcalanica, G. M. Thomson, 1892, p. 268, pi. xviii, tigs. 1—11 ; Caiman, 1908, p. 239. 
Diastylopsis neozealanica, Stebbing, 1913, p. 110. 
Occurrence. — Station 133. Spirits Bay, near North Cape, New Zealand. Plankton, 
20 metres depth. One male. 
Remarks.- —The solitary male specimen is imperfectly preserved, and is only 
referred to Thomson’s species (of which no male has yet Been recorded) because the 
ridges on the carapace are arranged as in the female specimen in the Museum collection 
which I have mentioned (/.r.) as belonging to this species. From the female it differs 
in the characters proper to its sex, and it is to be 
noted, in particular, that the flagellum of the 
antennule has the conspicuous spurs described in 
Ik insularum at the end of the basal segment 
O 
(Caiman, 1908, p. 237, figs. 5 and 5a). The 
accompanying figures show the disposition of the 
ridges of the carapace in the “ Terra Nova ’ 
specimen. 
in the neighbourhood of this species I would 
place a specimen obtained by the “Discovery” at 
the Auckland Islands, and mentioned but not 
described in my report on the Cumaeea of that 
expedition. The specimen is in very poor con¬ 
dition, having apparently suffered drying, and the 
carapace, in particular, is so crumpled that its 
sculpturing can no longer be distinctly traced. 
All that can be said is that the appendages show 
a general agreement with D. neozealanica and 
Ik insularum, but that the carapace is not 
minutely spinous as in the latter species, while 
the ridges are apparently much less conspicuous 
than in the former. 
Stebbing (l.c. 
“ seems to be a variety of Ik neozealanica .” 1 do 
not know on what grounds this opinion is based, and it would require the examination 
of better-preserved and more abundant material than is at my disposal to confirm or 
disprove it. The species are certainly closely allied, as is shown by the characters of 
their appendages, but in the form which 1 described as Ik insularum the carapace is 
minutely spinous, with a scarcely perceptible ridge or line of spinules on the side of 
the carapace, while in the specimens that I refer to Ik neozealanica the surface of the 
carapace has three oblique lateral ridges, and apart from these is quite smooth. 
) states of /k insularum that it 
B. Dorsal view, of carapace. X 25. 
