Page:Quarterly Journal of the Geological Society of London, vol. 26.djvu/447

 Conosmilia, Duncan.

Coral simple, pedicellate, conical. Columella formed of one or more twisted laminae, which extend from the base upwards. Endotheca scantily developed. Septa apparently with simple margins, and variable in regard to the number of the primary.

27. Conosmilia elegans, Duncan. Plate XX. fig. 5.

The pedicel is large. The costae, equal, sharp, and prominent at the base, become broad, flat, and granular above, where they are separated by very faint lines. The columella is formed by one twisted lamella, and occupies much space. The septa are in eight systems of three cycles. There are eight primary septa which reach the columella ; the secondary are smaller and reach midway ; and the tertiary are very small. The septa are nearly plain, are as thick at the columella as at the calicular margin, and appear to arise between the costae. The calice is nearly circular.

Height 3/10 inch. Breadth of calice 1/10 inch.

Locality. Geelong, Victoria, South Australia.

28. Conosmilia anomala, Duncan. Plate XX. fig. 10.

The coral is tall in relation to its small pedicellate base. The costae are not prominent, but are traced by the faint lines which separate them, and by the fine herring-bone pattern which marks each of them. The columella is large and strong, and consists of two twisted riband-shaped laminae. The septa are in eight systems of three cycles ; the laminae are sparely granular ; and the primary are attached to the columella by processes. The secondary are smaller than the primary, and their inner edge is wavy ; the tertiary septa are small. The septa arise between the costae. The endotheca is sparely developed. The wall is very thin. The calice is slightly elliptical.

Height 6/10 inch. Greatest breadth 2/10 inch.

Locality. Hamilton, Victoria, South Australia.

29. Conosmilia striata, Duncan. Plate XX. fig. 9.

The coral has a very narrow base, and does not expand gradually. The costae are very, broad, have marked lines between them, are very flat, and have wavy transverse markings like those of a pellicular epitheca. Septa in six systems of three cycles ; the primary, which are granular, reach the columella, which appears to be formed by one twisted process. The septa arise between the costae. The calice is more or less elliptical.

Height 6/10 inch. Greatest breadth 2/10 inch.

Locality. Geelong, Victoria, South Australia.

30. Conosmilia lituolus, n. sp. Plate XX. fig. 11.

The corallum is horn-shaped, long, tapering and doubly curved. The pedicel is small. The body is marked with growth-rings, and the costae are very feebly developed. The intercostal spaces are in-