171 
the adradial side of the pore, which may convey the impression 
that there are two tentacle scales. 
The genital slits are narrow, not reaching beyond the second 
armjoint; an indication of papillæ along their edges. The teeth are 
strong, broad, squarish, six in each column. The mouth-structure 
upon the whole rather robust, recalling that of Ophiopholis. 
In the larger specimens it is not rare to find some of the dorsal 
armplates divided in two lateral halves through an oblique median 
line. — In a very young specimen, only 1,5 mm diameter of disk 
(Fig. 33), the primary plates are very prominent, the secondary 
plates have just made their appearance, viz. 5 interradial ones, ad- 
joining the corners of the central plate, and 5 radial ones (or rather 
3, the fourth and fifth having not yet appeared) beginning to separate 
the radial shields, which are still almost completely contiguous. The 
plate outside each radial shield has already appeared and is, on 
account of its white colour, very conspicuous. They very much give 
the impression of representing the side armplates corresponding to 
the inner dorsal plate. This, however, they do not, the side plates 
proper of this joint lying wholly on the oral side. It is a note- 
worthy faet that the arms of the young specimens may be of un- 
equal length (Fig. 33). The coloration of the disk plates in the young 
specimen — brown, with the distal part white — makes ihem very 
conspicuous. 
The Ophiurid which Bell (Op. cit.) mentions as Peciinura sp. 
I have had the opportunity of examining in the British Museum. 
There is no doubt that it belongs to the present species. 
Also in this species the eggs are rather large and yolky, which 
faet tends to indicate that it has, probably, direct development, 
without a pelagic larva of the typical Ophiopluteus-form. 
38. Ophioplocus Huttoni Farquhar. 
Fig. 34. 
Ophioplocus Huttoni. H. Farquhar. 1899. Description of a new Oph- 
iuran. Proc. Linn. Soc. N. S. Wales. p. 187. PI. XV. 
— — H.L. Clark. 1915. Catalogue Recent Ophiurans, 
p. 344. 
Slipper Island; under stones, at low water. 1 specimen. 
North Cape; under stones, at low water. 1 specimen. 
