800 Transactions. —Zoology. 
Though larger in general habit, and the hydrothecw are more of a sub- 
conical form than what we find in S. tricuspidata, I agree with Mr. Hincks 
that the two species are very closely allied to one another. 
S. simplex. Hutton, loc. cit. Coughtrey, ‘“‘Trans.,” loc. cit., p. 283. 
Figs 8 to 11, Pl. XX. 
In my paper to the New Zealand Institute, I expressed an opinion that 
S. simplea of Hutton was the New Zealand representative of S. polyzonias 
of Linneus, and I grouped along with Hutton’s species, several pigmy 
varieties in which the hydrothece were transversely wrinkled. In this I 
was wrang, and I would now regard Captain Hutton’s species as a distinct 
one, approaching nearest to Sertularella fusiformis of Hincks, while the 
transversely wrinkled variety is an intermediate form between S. rugosa and 
S. tenella (British species), but resembling more closely the latter, and the 
large form (‘Trans.,” loc. cit., Fig. 10, Pl. XX.), I have proposed to call 
Sertularella robusta. Vide ‘‘ Annals,”’ loc. cit. 
Genus Sertutaria, Linneeus (in part.) Hincks, ‘Brit. Hyd. Zooph.” 
S. bispinosa, Gray. 
Mr. Busk when reporting on the Sertularian Zoophytes and Polyzoa of 
South Africa (‘ Brit. Assoc. Reports,” 1850), remarked upon the resemblance 
between this species and 8. operculata (British.) The likeness only holds 
good between one of the varieties of S. bispinosa, of New Zealand, and that 
is the extremely lax, slender and delicate variety. The other variety both 
by the peculiarity of its gonothece, and its more robust and coarse habit is 
different from the British form. 
S. ramulosa, mihi. Trans., loc. cit. There are two varieties, coarse and 
delicate. 
S. trispinosa, mihi. Trans. loc. cit. 
The intermediate position of this species between S. bispinosa and S. 
ramulosa, has been preserved in all recent specimens. 
S. abietinoides. Gray. 
One variety of this species bears a close resemblance to S. jilicula 
(British species) in its general habit, but the characters of the hydrothece 
and of the gonothecw are quite distinct. Similar differences separate it 
from the more robust British ally S. abietina. 
S. fusiformis, Hutton, loc. cit. Coughtrey, p. 285 (Trans. loc. cit.) 
In consequence of there being a likelihood of this species being confused 
with Sertularella fusiformis, of Hincks, I would suggest for this species the 
name of Sertularia longicosta (from the crest along one side of the gono- 
thece.) Its ovarian capsules, approach somewhat the form of those 
described by Mr. Busk, on the South African variety of Pl. cristata, again 
the apex of the capsule has an appearance not unlike the crest of Camp. 
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