128 Rev. T. Hincks’s Contributions towards 
The present form is ranked under the genus Lunulites 
provisionally. We are not yet in a position to discuss the 
affinities and systematic place of the various members of the 
Selenarian group. 
Suborder CYCLOSTOMATA. 
Family Tubuliporide. 
TuBULIPORA, Lamarck. 
Tubulipora capitata, n. sp. 
(PL. IV. fig. 9.) 
Zoarium white, wholly adnate, composed of a number of 
capitate or clavate portions, which originate one from the 
other by means of a slender, stem-like base, and form a linear 
series, slightly branched. Zowcia slender, minutely speckled, 
with a circular orifice, disposed radiately on the expansions, 
the anterior half erect. Gonocysts consisting of an irregularly 
shaped inflation of the surface, thickly covered with minute 
puncta, freely produced, sometimes as many as three on an 
expansion. 
Loc. Bass’s Straits, on shell. 
This seems to be a distinct species ; several specimens have 
been examined, which all exhibit the same remarkable habit of 
growth. The free production of gonocysts appears to be a 
distinguishing character ; they form a succession of transverse 
swellings on the surface of the zocecial expansions. 
ADDITIONAL. 
Family Membraniporide. 
[The remarkable form which is described below has the 
true Membraniporidan cell, the characteristic Flustrine habit 
(though without the flexible membrano-calcareous zoarium), 
and the marginal rib, which is the distinguishing feature of the 
Flustramorpha of Gray. It seems to occupy a somewhat 
intermediate place between Flustra and Membranipora. I 
shall hope to discuss its systematic place hereafter, and leave 
it provisionally amongst the Membranipore. | 
Membranipora roborata, n. sp. 
(Pl. II. fig. 3.) 
Zoarium erect, calcareous, bilaminate, compressed, the 
stem expanding slightly upwards, divided and subdivided 
dichotomously into narrow segments, a thickened rib along 
