REPORT ON THE POLYZOA. 
167 
(11) Schizoporella triangula, Hincks. 
Schizoporella triangula, Hincks, Contrib. vi., Ann. and Mag. Nat. Hist., ser. 5, vol. viii. 
p. 12, pL ii. figs. 4, 4a, 1881. 
Character. — Zoarium adnate or partially free (on sponge), sometimes with superposed 
layers. Zooecia disposed irregularly or in linear series and separated by raised septa ; 
subquadrangular or irregular in outline; surface nodulose (sometimes reticulato-punctate) ; 
of two kinds, barren and fertile or ooecial. Orifice of barren cells subtriangular, arched 
above and much contracted or pointed below, with a small articular denticle on each side 
near the bottom ; of the fertile or ooecial cells, much larger, elongated transversely and 
arched above, with a slightly sinuated entire lower border. A small avicularium with 
an acute triangular mandible close to the orifice; and on the front a vertical elongated 
avicularium with a slender spear-shaped mandible slightly dilated at the point, upon 
which is a minute obtuse mucro. Opercula of two kinds corresponding to the two forms 
of orifice, both thick and solid, and marked with fine curved transverse wrinkles. 
Habitat. — Station 162, off East Moncceur Island, Bass Strait, 38 fathoms, sand and 
shells. (?) Station 151, off Heard Island, 75 fathoms, volcanic mud. 
[Bass Strait, 40 fathoms ; common, Hincks.] 
In the quite young state the surface appears to be reticulato-punctate, but generally 
it is closely nodulose. The nodules, more especially in the fertile or ooecial cells, are often 
developed into large verrucose elevations which sometimes project over the ooecial orifice 
so as almost to conceal it. The triangular operculum of the barren cells closely resembles 
that of Lepralia arrogata, Waters, from the Mediterranean, but in that form there is but 
one kind of operculum, which moreover does not present the transverse rugse visible in 
that of Schizoporella triangula. 
10. Gephyrophora, n. gen. 
Character. — Zoarium dimorphous, either erect and irregularly branched, and cylin- 
drical with the zooecia disposed round an imaginary axis, or decurrent, loosely encrust- 
ing, and unilaminar. Zooecia completely immersed, flat in front, parted by septal 
ridges. Surface beneath the epitheca finely reticulate. Primary orifice arcuate, 
with the lower border slightly sinuated, afterwards transversely oblong. A prominent 
avicularian process on each side of the orifice, the two eventually inarching and forming 
a bridge in front of it. 
(1) Gephyrophora polymorpha, n. sp. (PI. XXXIV. fig. 2). 
The only species. 
Habitat.— Station 142, lat. 35° 4' S., long. 18° 37' E., 150 fathoms, green sand. 
[S. Africa, Mrs. Gatty.] 
