Microscopical Society of Victoria . 
43 
theca, and widening towards the summit, with from one to three 
constrictions on the inner side ; proximal intemode short, without 
appendages. Hydrothecre campanulate ; margin entire, slightly 
everted, rising a little above the summit of the pinna, at right 
angles to it and the hydrotheca. Sarcotheca? bithalamie, with 
slender pedicles, two abreast above and one in front of each liydro- 
theca, and two in each axil. 
Gono theca? six or seven times the length of the liydrotliecse, 
ovate, obliquely truncate, the orifice surrounded by large, smooth 
internal teeth. 
Colour, pale yellowish, transparent. Hob. Queenscliff. 
P. compressa. n. sp . Plate XV, fig. 5. 
Shoots pinnate, stem smooth, about one-fourth of an inch in 
height, pinme alternate, wrinkled transversely, each borne close to 
the summit of an internode, and bearing a single hydrotheca ; 
distal part curved from under the base of the hydrotheca, smooth; 
proximal internode short, without, appendages. Hydrothecse 
much compressed laterally ; aperture at right angles to the pinna 
and hydrotheca, sinuated behind down to the summit of the 
pinna. Sarcotheca?, two above and one in front of each hydro¬ 
theca, bithalamie, with slender pedicles ; one in each axil, tubular, 
slender, very inconspicuous. 
Gonotlieca? about four times the length of the hydrotlieca?, very 
convex behind, slightly concave in front; aperture in a line with 
the front, margin everted. 
Colour, pale yellowish, transparent. Hctb. Robe, S. A. ? 
(Mr. Smeaton). 
Since the publication of the preceding paper in a separate form I 
have added a few notes, which, owing to the delay in issuing the 
present number, I am enabled to include in it. I have obtained 
a quantity of fresh material collected at Queensclifi*, severe gales 
having thrown ashore an unusually rich harvest of zoophytes 
and Bryozoa; these additions consist mainly of the more con¬ 
spicuous forms, and their examination necessitates some slight 
modifications in a few of the specific descriptions. There are 
among them four or five Sertulariw which appear to me to be new. 
Having sent Mr. Busk some of our species for identification, he 
