The group of shells figured on Plate VIII. (excepting Fig. 12, whose position is doubtful) constitute a natural section of turbinate or trochiform species, which should be classed under one and the same genus, or at most only separated subgenerically. They are characterized, for the most part, by a conical spire, having a rather wide angle; are few whorled, separated by a widish suture, and imperforate. The sculpture is rich, consisting of spiral bands of more or less prominence, which sometimes constitute varices, single or double, as the case may be. These spiral bands are usually granulated or tuberculated, and are continued into the base of the shell, which is convex and much produced. Between these spiral bands is a fine system of axial (radial) lines or striæ, sometimes bifid, and probably forming crenulations in connection with the more prominent spiral ornaments.

The carnivorous Dinosauria form a well-marked order, which the writer has called the Theropoda, in his classification of this group. Although much has been written about these reptiles since Buckland described Megalosaurus in 1824, but little has really been made out in regard to the structure of the skull, and many portions of the skeleton still remain to be determined.

Perhaps very few Tertiary formations have received a greater amount of attention from geologists and collectors of fossils, during the last forty years, than the Red Crag of Suffolk and Walton-Naze; and it seems singular that so few traces of land life have resulted from so much research. Although in its southern portions it is strictly a marine deposit, yet its distance from shore could not have been very great at any point; but putting aside the few plants and mammalian remains, most of which in the coprolite portion of the Red Crag are derivative, there is little evidence of its proximity.

A few bones of birds are recorded by Mr. Gerard Krefft as having been found in association with the remains of the extinct mammalia, which abound in the breccias of the caves and fissures in the limestone rocks of the Wellington Valley, New South Wales. The bird bones belong to various genera and species, but only those of the Emu seem, as yet, to have been identified, and these were in the possession of the late Rev. W. Branthwaite Clarke. They do not appear to have been described, nor is the number of fragments in the collection stated. Unfortunately Mr. Clarke's valuable collection was deposited for exhibition in the “Palace Garden,” a temporary building erected for the Intercolonial Exhibition at Sydney in 1879–80, and was consumed in the disastrous fire which destroyed the building and its contents soon after its close; and, as regards Mr. Clarke's specimens, the destruction of the material evidence on which the early appearance of the Emu in Australia was founded. However, there is preserved in the palæontological collections in the British Museum, South Kensington, a portion of a shin bone, that I discovered some years ago in a collection of fragmentary remains from the Wellington caves, presented to the National Collection by the Trustees of the Australian Museum, Sydney. The specimen is the distal end of a right tibia, somewhat mutilated, but is interesting as being additional evidence, still existing, of the Emu having been contemporary with the great extinct Marsupials; as such, and on account of the rarity of its remains, I have thought it worthy of a short notice. Compared with the tibia of an adult Emu (Dromaius Novœ-Hollandiœ), it is indistinguishable from it, but has belonged to a larger individual, as shown by the annexed few measurements, in inches and tenths.