278 
skin, apparently of a glandular character. — The madreporite is 
almost, or even completely concealed by the paxillæ. — Pedicel- 
lariæ are completely wanting. 
Colour creamy white, irregularly mottled with black, both on disk 
and arms, except on the oral side which is of a uniform whitish colour. 
This species appears to be the nearest related to the Hawaiian 
species Luidia hystrix Fisher, from which it differs, however, in 
some important points. In L. hystrix the central spine of the paxillæ 
is much more prominent, and also the inferomarginal and adam- 
bulacral armature is somewhat different; then pedicellariæ occur 
on the intermediate plates in L. hystrix, while in L, varia they are 
completely wanting. — Also to L. maculata the present species 
bears some resemblance, but the numerous pedicellariæ of L. ma- 
culata and the less numerous inferomarginal spines, as also the 
total absence of a paxillary spine distinguish it markedly from the 
New Zealand species. Whether the difference in regard to the 
number of arms — 7 in the New Zealand species, 8 in L. hystrix 
and 7 8 in maculata — is a sufficiently constant character, remains 
to be seen, but the characters pointed out above are proof enough 
that the New Zealand species is not identical with any of the two 
said species or, indeed, any other species of Luidia hitherto known. 
6. Luidia neozelanica n. sp. 
PI. XII. Fig. 5. 
Luidia sp. Benham. 1909. Sci. Res. N. Z. G. Trawling-Exped. 1907. 
Echinodermata. Rec. Canterb. Mus. 1 . 2 . p. 6. PI. X. 4 - 5 . 
Off White Island, 55 fms. Sandy mud. 19. XII. 1914. 9 specimens (mainly 
broken). 
Colville Channel, 35 fms. Sandy mud. 21. XII. 1914. 1 specimen (broken\ 
Arms 5. R—ca. 100 mm; r.—ca. 10 mm; R=ca. 10 r. (measured 
on the largest, broken specimen). R.=74 mm; r.= 8 mm; R.=^ 9 . 3 r; 
(measured on the single fairly complete specimen, PI. XII, Fig. 5). 
Evidently the length of the arms was, however, still somewhat greater 
in this specimen, the measured arm having apparently been regener- 
ated. Another, not regenerated arm, with the point broken, is almost 
as long and must have been not inconsiderably longer. The arms 
are very narrow and almost imperceptibly tapering towards the 
point, which is, in the larger specimen, fairly blunt. Breadth of arm 
