Microscopical Society of Victoria. 
21 
times; while the species from Griffiths’ Point were all collected 
and given to me by Mr. J. R. Y. Goldstein, whom I have also to 
thank for much valuable assistance in other ways. Sertularia 
acanthostoma , S. recta , and Plumularia compressa are described 
from specimens in a collection of South Australian species, for¬ 
warded to Mr. Goldstein by Mr. T. B. Smeaton, of Adelaide. This 
collection also contained specimens of several of the other species 
here described, which are noted in their respective places. 
Family, Sertulariid./E, Hincks. 
Sertularia, Linn ecus. 
The gonothecie of some of the species are unfortunately absent; 
it is therefore possible that they may belong to the genus Diphada. 
From the general aspect of the polyparies, however, it appears 
most probable that they are true Sertularia ;. 
S. minuta. n. sp. Plate XII, fig. 1. 
Shoots simple, minute, divided by constricted joints into inter¬ 
nodes, each bearing a pair of opposite liydrothecse. Hydrotheca> 
tubular, those of a pair adnate to each other in front, slightly 
separated behind; base expanded outwards, forming a somewhat 
angular projection; upper part abruptly divergent horizontally, 
with a fold or crease in the angle; divergent part short, free ; 
aperture directed outward, and slightly forward, somewhat ex¬ 
panded, with three teeth, one superior, and two lateral; emarginate 
below. 
Gonothecai large, thick, oblong, springing from behind the basal 
part of the proximal internode, about equal in height to four 
internodes of the stem, operculate, mouth surrounded by minute, 
scattered denticles. 
Colour, brown. Hab. Sorrento (Mr. J. B. Wilson). 
Though the sea-weed on which these species occurred bore a 
considerable number of shoots, several with gonothecae, I failed to 
find any exceeding one-twenty-fourth of an inch in height, or 
consisting of more than four intemodes. 
S. pumiloides. n. sp. Plato XII, fig. 2. 
Hydrorhiza reticulate, with the margins irregularly scalloped or 
zig-zag, shoots simple, about one-fourth of an inch in height, con 
