122 
in the inner part of the arm in the larger specimens, increasing 
in length from the ventral side upwards, the uppermost one being 
again smaller, sometimes quite small. They are very siender, smooth 
(— I do not find them “granular^, as Farquhar States them to 
be —), flattened dorsoventrally and with a slight furrow along the 
upper side. They are not widened at the point. 
The tubefeet are strongly papillated, as usual in Ophiocoma. 
The very small size of the eggs indicates that the larva must be 
a typical Ophiopluteus. 
Some of the armspines are clubshaped through the skin being 
much thickened in the outer part. That this is due to an infesting 
parasitic organism may well be concluded from the faet that the 
occurrence of such swollen spines is without any order whatever. 
What sort of organism I have been unable to ascertain. In sections 
of such spines the skin is seen to have a peculiar radiate struc- 
ture; but no trace could be found of a foreign organism to the 
action of which this peculiar structure might be due. 
As pointed out by Clark (Op. cit.) this species is most nearly 
related to Ophiocoma canaliculata Ltk., with which it has in common 
a. o. the peculiar character of the canaliculate spines. 
15. Ophioptevis antipodum E. A. Smith. 
Fig. 10 
Ophiopteris antipodum. E. A. Smith. 1877. Description of a new form 
of Ophiuridæ from New Zealand. Ann. Mag. Nat. 
Hist. 4. Ser. XIX. p. 305. PI. XV. 
— — Th. Lyman 1882. “Challenger“ Ophiuroidea; 
p. 168, 176. 
— — H. Farquhar. 1897. Contribucion to the Hist. 
N. Z. Echinoderms. Journ. Linn 
Soc. Zool. XXVI. p. 192. 
— — — 1898. Echinoderm Fauna of New 
Zealand. Proc Linn. Soc. N.S. Wales, p. 308. 
— — H L. Clark. 1915. Catalogue Recent Ophiurans. 
p. 294. 
While no specimens of this species were collected by myself 
during the investigations in New Zealand Seas, I had the pleas- 
ure of receiving two fine, dried specimens from. Mr. W. R. B. 
Oliver, who had found them under stones at low water mark at 
Rangitoto Isl. in Auckland Harbour. The species having hitherto 
