Microscopical Society of Victoria. 
27 
hydrotheca, forming an intrathecal ridge. Sarcotheca^ short, 
bract-like, situated about the middle of the front of the hydro- 
theca, and subtending an aperture in it; completely open on the 
inner side. 
Gonothecze entire, ovate, borne in long rows on the stem at 
the bases of the pinnae, directed slightly towards opposite sides 
alternately. 
Colour, light or dark brown. Ilab. Griffiths’ Point (Mr. Gold¬ 
stein) ; Kobe and Point Elliott, S.A. ? (Mr. Smeaton). 
The sarcotheca in this species differs from those of some Aglao- 
phenice, in which a wide opening is formed by the confluence of 
the lateral and terminal apertures. It is not an incomplete tube, 
but a mere bract, placed opposite the orifice in the hydro theca, 
and is attached by its base only. It may sometimes be seen 
projecting at right angles from the hydrotheca, having been 
accidentally pushed out of its proper position. The long anterior 
tooth of the hydrotheca somewhat resembles the anterior sarco¬ 
theca of Aglaophenia. I have seen a true Aglaoplienia in which 
the anterior tooth was similarly elongated, while the sarcotheca 
was quite small. 
Aglaophenia, Lamouroux. 
The different species of Aglaophenia which I have obtained on 
our shores have all many characteristics in common. They are 
mostly furnished with a long mesial sarcotheca, often double the 
length of the calycle; and whether long or short, this sarcotheca 
has, except in A. parvula, two distinct external apertures ; besides 
which, in some species, there is a third aperture, communicating 
with the cavity of the calycle. Kirchenpauer’s sub-genus 
Macrorhynchia was formed to include those species distinguished 
by a long mesial sarcotheca, with two external apertures, and also 
by having the gonothecte unprotected by corbuhe. Professor 
Allman has pointed out that these characteristics are not always 
combined, as his A. acanthocarpa possesses the long sarcotheca, 
with two apertures, but has the gonothecae protected by well- 
developed corbulte. A. plumosa and A. McCoyi , described in this 
paper, agree in both these points with A. acanthocarpa. More¬ 
over, some of our species are furnished with sarcothecso only about 
as long as the calycle, which, nevertheless, have two apertures, 
