Campanularia caliculatci. Hincks. 
I obtained this species on the 24th September 1857, from rock 
pools near low-water mark in Courtmasherry Harbour, with the 
gonophores. I obtained it afterwards in considerable quantities to- 
wards the end of the following October, from the same locality, ad- 
hering to Delesseria sanguined, brought up on the long lines of the 
fishermen, but it was then almost entirely destitute of gonophores. 
The gonophores are borne on the creeping stolon, to which they 
are attached by a short peduncle. They are of an irregular oval 
shape, with the summit truncated. 
The blastostyle, in every case I examined, carried one large spo- 
rosac, which pccupied about the upper two-thirds of the gonophore, 
and one smaller, and less developed, springing from the blastostyle 
near its base. 
The sporosacs present some interesting peculiarities. The ma- 
nubrium is obsolete, but four gastrovascular canals extend from the 
base of the sac to the summit, where they terminate in blind ex- 
tremities. These canals send out short, lateral, alternate branches 
between every two of which, in the female sporosacs, an ovum is 
embraced. The germinal vesicle and spot are distinctly demonstrable, 
and the ovum is itself invested by a delicate membranous sac, which 
confines it in the sinus between the branches of the gastrovascular 
canals. 
I had no opportunity of observing the development of the ovum. 
Plumularia pinnata. 
The gonophores, which are compound, are of an oval form, some- 
times smooth, sometimes with a few irregular spiny longitudinal 
ridges. They are borne on the central stem or rachis, chiefly towards 
its attached end. 
The blastostyle is but moderately developed, and carries usually 
only a single sporosac ; but I have occasionally met with two or three. 
The manubrium, after advancing for a short distance into the sporo- 
sac, becomes much, but irregularly, lobed. Into these lobes the 
cavity of the manubrium is continued, and they may be fairly taken 
to represent the gastrovascular canals, which have no further equi- 
valent in this species. In very young sporosacs the manubrium 
appears quite simple, but as the sporosac advances towards maturity 
the lobed condition becomes apparent. 
