Zoophytes from A ustralia and Neiv Zealand. 105 
This little species, formerly described by Dr. Couglitrey as 
a second species of Allman’s singular genus Synthecium, was 
afterwards stated by him to be inseparable from Sertularia 
pumila. While it is plain that it can by no means be referred 
to the former genus, there also seem to be ample grounds for 
constituting it a distinct species of the latter one. It is un¬ 
doubtedly very closely allied to S. pumila , L., and to S. 
gracilis , Hincks ; but it differs markedly from both in the 
small size both of the trophosome and of the individual hydro¬ 
thecae. The teeth also on the margins of the hydrothecae seem 
larger and more distinct than in the British species. 
My specimens are of a whitish colour, and occur densely 
investing a species of Fucus (?) 
Locality. Gulf of St. Vincent, Adelaide {Dr. Ferd. Muller) • 
Australia {Dr. Harvey). Dr. Coughtrey’s specimens were 
from the Middle Island, New Zealand. 
Sertularia australis , Kirchenpauer. 
(PI. NVII. figs. 4, 4 a.) 
Sertularia rufa, D. W. T., MS. 
Trophosome. Hydrorhiza filiform, creeping. Ilydrocaulus 
attaining a height of about an inch, much twisted at the base. 
Pinnae alternate. Hydrothecae on the pinnae opposite, in 
pairs, closely adnate, one or two pairs to each internode ; on 
the stem subalternate, one in the axil of each pinna. Hydro¬ 
thecae tubular, a small part only divergent; smooth ; orifice 
small, directed outwards, provided with two teeth. Colour 
reddish. 
Gonosome. Gonangia attached to the main stem only ; 
globular or ovate, smooth ; margin everted ; aperture oper- 
culate. 
Localities. Sealer’s Cove, Port Philip, Cape Lefdbre {Dr. 
Ferd. Miiller) ; George Town {Dr. Harvey). 
This little species occurs, investing seaweeds, in some 
abundance, and with very numerous gonangia, from the above 
localities. I have now no doubt that my specimens corre¬ 
spond with Kirchenpauer’s species (S. australis ), founded on 
an example from Port Philip, though I at first separated them 
on account of one or two slight points of difference. In my 
specimens, for instance, the hydrothecae are longer and more 
tubular, the gonothecae seem a shade smaller and more globu¬ 
lar, and the zoophyte is coarser and less graceful feathery. 
These variations are not, however, sufficient for the founda¬ 
tion of a new species. 
The dried specimens are harsh and brittle to the touch;"and 
the colour is a distinctive and characteristic reddish brown. 
