177 
uish this species from all the species hitherto known. In regard to 
the character of the internal partitions the Australian species Echino- 
cyamus platytatus H. L. Clark resembles it, but otherwise that 
species has no likeness at all to the New Zealand species. 
That the species from the Kermadec Isl. recorded by Ben ham 
as Fibularia australis, is really identical with the present species I 
can assert definitely, having got some specimens of it from Mr. 
W. R. B. Oliver in Auckland. That it has nothing with the true 
Fibularis australis to do is evident from the facts that the pores 
of the petals are not conjugated, as they are in that species, and 
that internal partitions are present, which they are not in F. australis, 
these two characters being emphasized by Gray, who even thinks 
them of sufficient weight for making australis the type of a separate 
genus, Mortonia. I am inclined to agree with Gray in this view, 
but never having had the opportunity of examining specimens of 
the true F. australis, I shall not give any definite statement about 
that question at the present occasion. I would only take the op¬ 
portunity of stating that the Hawaiian form regarded by H. L. Clark 
as identical with F. australis cannot possibly be so, because its 
pores are not conjugated as they are in that species. It is true 
that both the Hawaiian and the New Zealand form resemble F. 
australis rather closely in general shape and in the size of the 
petals. But the definite statement of Gray that the pores in australis 
are „united in pairs by a cross groove“ (Catal. Ech. p. 37) (which 
cannot be done away with, until it has been proved, by a renewed 
examination of the type, to be a mistake), shows that these forms 
cannot be identical. 
That the New Zealand form is not identical with the Hawaiian 
form, which it resembles very much in appearance, is proved de¬ 
finitely by its internal structure, the Hawaiian form having no 
internal partitions except in the anal interradius. 
14. Peronella hinemoæ n. sp. 
PI. vi. Figs. 22-23 ; PI. VII, Figs. 31-35. 
Laganum sp. F. Jeffr. Bell, 1917. British Antarctic („Terra Nova“) 
Expedition 1910. Echinoderma. Zoology. Vol. IV. p. 6. 
Test nearly circular, thin and flat, the height being only Vs— 
76 of the test-length. The edge is not thickened. The oral side is 
Vidensk. Medd fra Dansk naturh. Foren. Bd. 73. 
12 
