4G 
Journal of the 
Aglaophenia Thompson i, Bale. The pinnre vary from alternate 
to nearly opposite, according to the length of the internodes from 
which they spring. Found at Queenscliff. 
A glaophenia prolifera , Bale. As in the last species the pinna 
vary from alternate to nearly opposite, a variation which will 
probably be found in most species which bear more than one pinna 
on an internode. Bobust specimens from QueensclifF have the 
mesial sarcotlieca fully double the length of the calycle, projecting 
from it and curved gracefully forwards. The cauline sarcothecre 
may have either two or three circular orifices. 
Aglaophenia pa r v illa , Bale. The second tooth on each side of 
the calycle is often folded behind the third, so that under a low 
power they appear as one tooth. 
Aglaophenia McCoy i, Bale. The calycle of this species is 
distinguished from that of A. ilivaricata , Busk, by the longer 
mesial sarcotlieca expanded at the summit, and by the secondary 
tooth on the median tooth of the calycle. In the front view as 
figured, though the summit of the anterior sarcotlieca is shown, 
the remainder of it, which should be continued down the front of 
the cell, is accidentally omitted. 
Plumularia indivisa , Bale. This is identical with the stemless 
variety of P. campanula, Busk. Mi\ HaswelPs collection contains 
specimens from Port Stephens and Holborn Island, which are 
pinnate and five or six inches in height. The hydroid from 
Griffiths’ Point, which I had supposed to be P. campanula , was 
considered by Mr. Busk to belong to that species, but the 
discovery of specimens with gonotheca} shows it to be distinct. 
Those of P. campanula are as shown under P. indivisa , while the 
large ones of the Griffiths’ Point species are three-sided, or like a 
right-angled triangle in section, with a row of four or five 
sarcotlieca* running down each of the narrower sides. Besides this 
there are differences in the trophosome which appear to be 
constant, the most patent being the thick stem with short 
internodes and both sets of pinnse borne on the front, while the 
stem of the true P. campanula is much slenderer, with longer 
internodes and more distant pinnae and calycles. I have found 
no gonothecie on the pinnate form of P. campanula, but cannot 
hesitate to identify it with the stemless variety described as 
P. indivisa. 
