23. Balanophyllia cylindrica, Michel, sp., variety a. Plate XXI. fig. 7.
The corallum is cylindro -turbinate and curved at the base, which is not pedicellate, but sharp. The calice is large, shallow, and very open. The epitheca is complete and covers the faintly distinguishable costae. The wall is moderately stout and cellular. The columella is moderately developed. The septa are stout ; and there are four cycles, in six systems : the higher orders unite with the tertiary about midway.
Height of corallum 7/10 inch. Breadth of calice 4/10 inch.
Locality. No. 1, 1-1/2 mile west of Cape Otway.
Variety β. Corallum more slender and columella larger than in variety α ; the same locality.
24. Balanophyllia Ulrichi, n. sp. Plate XXI. fig. 8.
The corallum is cylindro-conical, slightly curved, and has a small peduncle and a large open calice. The epitheca is dense and complete inferiorly ; but above, the costae are uncovered and are well marked, equal, rather prominent, separate, and finely granular. The columella is small. The septa are slender ; and there are four cycles, in six systems. The fossa is deep, and the margin thin.
Height of corallum 6/10 inch. Breadth of calice 3/10 inch.
Locality. No. 1, 1-1/2 mile west of Cape Otway, South Australia.
25. Balanophyllia tubuliformis, n. sp. Plate XXI. fig. 9.
The corallum is tall, cylindrical, and tubular in shape. There is no epitheca. The costae are equal, flat, vermiculate, and separated by distinct spaces. The calice is circular in outline, rather less in calibre at the margin than elsewhere, very deep, and it has a wide margin. The wall is stout and cellular. The columella is small, and at the bottom of the deep fossa. The septa are stout, and very granular ; and there are four cycles, in six systems. There is a very slight in-bending of the higher orders; and the septal arrangement has very little of the Eupsammian type.
Height of the corallum 8/10 inch. Breadth of the calice 3/10 inch.
Locality. Muddy Creek, Hamilton Tertiaries, South Australia.
26. Amphihelia incrustans, n. sp. Plate XX. fig. 6.
The corallum is flat and incrusting, and the calices arise like crateriform processes. The upper surface is irregular and marked with wavy, subequal, bifurcating costae, which pass upwards on the outside of the calice more or less obliquely. The calice is crateriform ; the margin is sharp, and the fossa is shallow. The septa are smaller than the costae, and not exsert ; there are three cycles, in six systems, and a few orders of the fourth cycle. The columella is small and projecting.
Breadth of the calice 3/20 inch.
Locality. No. 3, Upper " Coralline beds," near Cape Otway.
