DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL ASSOCIATION. 137 
4 .-— C. cribraria (Busk). 
One or two close short tufts, Bass’s Strait; Dr. Harvey. Improbable 
as it may at first sight appear, I have some suspicion that this may be 
a stunted variety of the last. The extreme forms are very distinct, but 
I have a singular series of intermediate specimens. 
5. —-Co alata, n. 8. Plate XIII., Pigs. 2, 4. 
Cells pyriform. Denestras 5-7. 
Irregular grooves pass inwards from the fenestrse, giving the 
space within a somewhat granular appearance. Lateral processes enor¬ 
mous, consisting of a large hollow conical ascending process, with a 
pyriform opening in front, a nearly tubular “ avicularian chamber” 
passing outwards opposite the upper third of the cell mouth, and end¬ 
ing in a minute avicularian; and a wide hollow fringe continued down 
to the base of the cell, and irregularly perforated in front. Ovicell (?). 
The specimen figured is somewhat smaller and more delicate than 
usual. The coencecium does not appear to attain a great size. All the 
specimens in the collection are parasitical on other Polyzoa, and on red 
Algae. Old specimens have often lost their large ascending processes, 
which gives them a very different appearance. 
Bass’s Strait; Dr. Harvey. Port Dairy ; J. Dawson, Esq. 
6 . — C. plagiostoma {Bush). 
Bass’s Strait; Dr. Harvey. On Eucoids, abundant and fine. 
7. — C. margaritacea {Bush). 
Bass’s Strait; Dr. Harvey. Port Dairy; James Dawson, Esq. Hew 
Zealand; Dr. Joliffe. 
' /3.—Catenicell^ Dasciat^ ( Wyv. T.). 
8 .— (7. Harveyi , n. s. Plate X., Digs. 1 , 2. 
Coenoecium forming loose, handsome, curling, brown tufts. Cells 
large, purely homy, vase-shaped; expanded superiorly by moderately 
large lateral processes, usually bearing large sublateral avicularia. Ex¬ 
ternal membrane thin, loosely investing the inner; and raised into conical 
papillae on the front of the cell. Inner membrane strengthened by a 
raised strap of chitine, continuous with the thickened rim of the cell- 
mouth, dividing immediately below the lower lip, and forming a ring, 
again uniting and passing down the middle of the front of its cell to its 
base; and by similar straps spreading, apparently irregularly, over the 
avicularian processes, and over the back of the cell. Ovicell calyptri- 
form; sessile by a broad base in the position of one of the avicularian 
processes of a cell, which it replaces. Back of ovicell furnished with a 
very large sessile avicularium. 
Bass’s Strait; Dr. Harvey. A single tuft. This is a remarkable 
and most distinct species. The cells are nearly as large as, and resem¬ 
ble in form, those of C. amphora. 
