104 
present, the only safe course seems to me to be that of regarding 
the New Zealand form as a distinet species. 
That this species is not identical with Ophiocreas constrictum 
Farquhar, to which it was referred by Bell, is very easily seen. 
The faet alone that the tentacle papillæ appear from the second 
joint (in O. constrictum from the third joint) is sufficient to prove 
these forms to be quite distinet, this character being of special 
importance within this genus. 
3. Astrotoma Waitei Benham. 
PI. IV. Fig. 2. 
Astrotoma Waitei. W. B. Ben ham. 1909. Scientif. Res. N.Z. Governm. 
Trawling Exp. 1907. Echinoderma. Rec. Canterb. Mus 1.2. p. 19. 
PI. IX. 1—6. 
Two specimens of this species having been lent me for 
examination, by Mr. Oliver and Prof. Ben ham, I take the op- 
portunity of giving a photographic figure of it, which 
may not be superfluous, as the drawings by Prof. 
Ben ham (Op. cit.) cannot, of course, give all the 
details so exaetly as does a photo. 
To the very careful description given by Ben¬ 
ham I would only add that the rounded ”scales“, 
stated to cover the upper surface of the disk, are 
more appropriately designated as grains. The seg- 
Fig. 3. Hook from mented appearance of the dorsal side of the arms 
Waitei. ws/i. is very differently developed in the two specimens 
examined by me — in one the depressions are very 
distinet, in the other, the one photographed, they are so narrow as 
to be hardly distinguishable. — The hooks are provided with one 
small tooth below the long, pointed endtooth. (Fig. 3). 
When Ben ham speaks — here and in other Ophiurid-descrip- 
tions — of the ”adradial“ plates, the meaning is, of course, the 
radial shields. 
4. Astrotoma Benhami Bell. 
PI. IV. Figs. 6-7. 
Astrotoma Benhami. F. Jeffr. Bell. 1917. Brit. Antarctic „Terra Nova“ 
Exped. 1910. Echinoderma. Zoology. IV.i. p. 8. 
