242 Transactions. 
those near summit of shoot, where border often appears almost flat and 
very thin. The hydrotheca is commonly somewhat constricted on outer 
side, just below border, and the internal teeth are strongly developed. 
onangia considerably larger than those of S. solidula, but otherwise 
much resemble them. They differ from those of S. simpler in absence 
of conical teeth on summit. 
Specimens from the Hincks collection in the British Museum have 
somewhat shorter hydrothecae than those received from Professor Chilton. 
Sertularella polyzonias (Lin.). 
Farquhar, 1896, p. 463. 
S. polyzonias was included in Farquhar's list in the belief that it was 
the same as S. simplez (Hutton), which is not the case. I do not thi : 
that the true S. polyzonias has been recorded either from New Zealand ; 
or from Australia, the form from Bass Strait which I formerly assigned 
to that species being more nearly allied to S. mediterranea Hartlaub. 
Sertularella integra Allman. 
Sertularella integra Allman, 1876, p. 262: Farquhar, 1896, p. 464: Hartlaub, 
1900, p. 65. : 
I have received a fragment of the type specimen from British Museum. . 
The species is readily identifiable by Allman's figure—the rugose condition х 
of the upper sides of the hydrothecae is even more pronounced than in 
the figure; the outline at this part is quite deeply crenate. 
The mouth portions of the hydrothecae are much broken, but I am 
convinced that Allman’s statement, “The perfectly even rim of the 
hydrotheca, destitute of all trace of teeth, is an obvious feature," is 
incorrect. There seem to have been three or four (probably four) shallow 
emarginations of the border, as usual in the genus. The internal 
“ conical process " referred to by Allman is one of the internal teeth now 
known to exist in so many species. All three are present, one being on 
the apocauline side, the other two, as usual, equidistant from it and from 
each other. They are here very large, but being thin and hyaline they 
are inconspicuous, especially in Canada balsam. 
Sertularella subarticulata (Coughtrey). 
Thuiaria subarticulata Farquhar, 1896, p. 465 : Hilgendorf, 1897, p. 210. 
Sertularella subarticulata Briggs, 1918, p. 36. 
Typ cimens were received from the Dunedin Museum. Former 
accounts, which described the hydrothecae as having two or four teeth, — 
are erroneous; the species is undoubtedly tridentate, but the superio — 
tooth, seen laterally, often appears split. The hydrothecae are extremely 
brittle. P 
met 7 
Sertularella quadridens (Bale). us 
Thuiaria quadridens Bale, 1884, p. 119; 19145, p. 12: v. Lendenfeld, 1884, 
p. 915 : Weltner, 1900, pp. 585-86 : Farquhar, 1896, p. 465. : 
Sertularella quadridens Ritchie, 1910c, p. 818: Billard, 1910, p. 11: Levinsen, 
1913, p. 279 : Jádenholm, 1916, p. 6. 
Thuiaria vincta Allman, 1888, p. 68. 
Billard states (1910) that observation of the type of T. vincta. Allman 
ns. 
. 
shows its complete identity with S. quadride 
