26 
Journal of the 
similar teeth, but single and narrower, within each of the other 
two sides of the aperture. 
Gonothec® sub-globular, between two and three times as long 
as the hydrothecae, with a few distant, transverse rugae; summit 
truncate. 
Colour, brown, very dark and opaque before preparation. 
Hab. Griffiths’ Point (Mr. Goldstein.) 
Each gonotlieca was surmounted by a globular body about 
equal to it in size, which is probably an external marsupiurn, but 
which could not be seen distinctly, owing to its being coated with 
sand and other foreign matter. 
Thuiaria, Fleming. T. lata. n. sp. Plate XIII, fig. 2. 
Shoots pinnate, sometimes branched, one or two inches in 
height; stem fascicled towards the base, divided into internodes, 
each of which bears a single hydrotheca on one side, and a pinna 
between two hydrothecse on the other. Pinnae alternate, not 
close, long, straight, narrow at point of junction with the stem; 
divided into internodes of various lengths. Hydrothecse tubular, 
adnate their whole length; base not divided off from the cavity 
of the liydrocaulus; aperture oblique, with two lateral teeth, 
sometimes nearly obsolete. 
Gonothecas? Colour, whitish. Uab. Griffiths’ Point (Mr. Gold¬ 
stein). 
Family, PlumulariidjE, Hincks. 
Halicornopsis. n. gen . 
Hydrothecse unilateral, uniserial, with a single sarcotheca 
attached to the front of each ; no other sarcothecse on the poly- 
pidom. 
Gonotliecse without corbula3. 
H. avicularis. n. sp. Plate XIII, fig. 3. 
Polypidom irregularly branched, five or six inches in height, 
pinnate ; pinnse alternate, nearly straight, ascending; one or two 
on an internode. Hydrothecse cup-shaped, shallow, set at an 
angle of about 45°, the margin expanding, with three spine-like 
teeth, two lateral and one anterior ; the latter long, beak-like in 
lateral view, tubular, with the front produced downwards into the 
