298 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Feb. 9, 
ends of the long axis than elsewhere (in sections). The calice is not 
shallow, is elliptical, and presents, deeply seated, a long lameliar 
columella, which is joined to the primary and secondary septa by pro- 
cesses. The septa are well developed and plain ; they are not exsert, 
but pass straight downwards and inwards towards the columella ; 
they do not correspond to the coste, but to the intervals between 
the cost, and they number thirty-two. There are three cycles, 
with the orders of a fourth, in two systems. 
Height } inch. Breadth 4 inch. Small diameter, halfway, +, 
inch. 
Locality. Hamilton, Victoria, South Australia. 
6. SpHENoTROcHUs ExcIcus, Duncan. Plate XIX. fig. 6. 
The coral is generally much compressed, especially inferiorly, 
where two lateral processes give a notched or emarginate appearance 
to the base. Superiorly the relation of the long to the short axis is 
at least as 2 tol. The coral is short and broad ; the base is nearly 
as wide as the calice is long. The costex are large and plain, and are 
separated by well-marked lines: the costs of the appendices are the 
largest ; they pass upwards to the calice, and all are more or less 
wavy, the central widening out near the calicular margin. The 
ealice is shallow and elliptical. The columella is not long, and, from 
being joined to the primary and secondary septa by processes which 
are rounded above, is confused in its appearance. ‘The septa are in 
six systems of three cycles; they are wider at the wall than else- 
where, and granular, and those of the third cycle are much smaller 
than the others. All the septa correspond to the depressions between 
the costee. 
Height 7 inch. Breadth 52, inch. 
Locality. Hamilton, Victoria, South Australia. 
7. Conorrocuus M‘Coy1, n. sp. Plate XIX. fig. 7. 
The corallum is small, claviform, straight, and marked with strong 
transverse ridges of epitheca. The calice is circular-in outline, and 
the margin is rather stout. The septa are unequal; there are three 
cycles, in six systems; and the primary, which reach the columella, are 
very stout, slightly arched, and faintly granular. The secondary 
septa are smaller than the primary, and they occasionally reach the 
columella; the tertiary septa are either rudimentary or only faintly 
seen. The columella is stout, papillary, essential, and projecting. 
Height of the corallum 4 inch. Breadth of the calice about 1 
inch. 
Locality. 1-13 mile west of Cape Otway. 
8. Conorrocuus typus, Seguenza, var. AUSTRALIENSIS. Plate XIX. 
fig. 8. Segu. Disqu. Pal. intorno ai Corall. Foss., Mem. Acad. 
Turin, tom. xxi. p. 478. : 
The corallum is small, cylindro-conical, curved and pedicellate. 
The epitheca is strong, and ridged transversely, and reaches to the 
calicular margin; it is marked with wavy lines transversely, and 
