302 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 9;
Locality. No. 7, 2-1/2 miles east of the river Gellibrand, Victoria,
South Australia.
17. Balanophyllia campanulata, n. sp. Plate XXI. Fig. 1.
The corallum is pedicellate, has a slight constriction immediately above the small base, and expands regularly into an elongate bell-shape. The epitheca exists inferiorly ; but it is very delicate, and permits the flat costae to be distinguished. The calice is elliptical, and the margin is slightly everted ; the wall is moderately developed. The columella is large, long, spongy, and prominent. The septa are stout : there are four cycles ; and the septa of the fourth and fifth orders unite with the tertiary midway between the wall and the columella. The tertiary septa, after the junction with the others, are as large as the primary and secondary septa. The laminae are granular. The costae, where uncovered, are separated by distinct intercostal spaces with numerous foramina ; they are slightly unequal, and have both granulations and foramina on their flat external surface. There are rarely more than two rows of granules ; and they are scarce.
Height of the corallum 8/10 inch. Breadth of the calice 5/10 inch.
Locality. No. 4, clay beneath " Coralline beds," near Cape Otway. It is associated with Trigonia semiundulata.
18. Balanophyllia seminuda, n. sp. Plate XXI. fig. 2.
The corallum has a wide base, with a constriction immediately above it, and is cylindrical, but slightly wider at the calice than elsewhere. The epitheca is very dense for half the distance up the corallum, and is wanting elsewhere. The costae, invisible below, are distinct where the epitheca does not exist above ; they are formed by vermiculate projections. The calice is circular in outline ; its margin is thin, except at the origin of the primary and secondary septa, where it is thick and cellular ; and its fossa is very deep. The septa are unequal, exsert, curved above, and more or less vertical at their inner edge ; they are marked with ridges which are directed inwards and upwards, and with endothecal ridges crossing the first kind. The primary septa are stout and very exsert, and the secondary septa are smaller and less prominent ; the tertiary septa, after their union with those of the fourth cycle, are very stout, and reach the columella ; the septa of the fourth and fifth orders join the tertiary about halfway to the columella. The columella is small and spongy, and is situated very deeply in the fossa.
Height of the corallum 8/10 inch. Breadth of the calice 3/10 inch.
Locality. Hamilton Tertiaries, Victoria, South Australia.
19. Balanophyllia armata, n. sp. Plate XXI. fig. 3.
The corallum is subcylindrical, tall, compressed and armed with a winglike projection immediately above either side of the base ; the base is moderately large, and presents evidences of attachment to some substance during life; there is a slight constriction above the base. The epitheca is imperfect, and surrounds the corallum here
