44 Reports and Proceedings— 
comparable to zygosphene and zygantrum, which must have given 
great fixity to this part of the vertebral column, contrasting 
strongly with the flexibility of the neck. The longitudinal side 
chambers reach their greatest development in the vertebre refer- 
able to the fore part of the trunk ; they lessen toward the loins, and 
are absent from the neck, which is regarded as conclusive of their 
pneumaticity, and against their having been occupied by cartila- 
ginous and fatty tissues, which might have equally occurred through 
the whole length of the vertebral column, and not been limited to a 
particular region in close vicinity to the lungs. The whole con- 
struction affords a notable illustration of immense bulk attained 
with the use of the smallest quantity of bony tissue, which occurs 
in the form of very thin sheets or plates. The transverse and 
spinous processes are strengthened by flying buttresses. The vault 
of the neural canal is beautifully groined, whence the original name 
Eucamerotus. he author then pointed out the family resemblances 
between this Isle-of-Wight Wealden form and the new Colorado 
Dinosaurs, which have many points in common, but are both gene- 
rically and specifically distinct from Ornithopsis. 
2. “On the Concretionary Patches and Fragments of other Rocks 
sometimes contained in Granite.” By J. A. Phillips, Esq., F.G.S. 
Patches resembling fragments of other rocks frequently occur in 
granite, sometimes angular, sometimes rounded, sometimes with 
clearly defined boundaries, sometimes melting away into the surround- 
ing mass, generally finer in grain than the latter. After a sketch 
of the literature of the subject, the author described the results of 
chemical and microscopic investigations of these patches in the 
granites of Cornwall, Shap Fell, Aberdeen, Peterhead, Fort William, 
and North-eastern Ireland. There are two classes of inclusions, 
(1) the result of the abnormal aggregation of the minerals consti- 
tuting the granite itself, containing generally more plagioclastic 
felspar, mica, or hornblende than it, with some other distinctions: 
most probably concretions formed contemporaneously with the soli- 
dification of the mass; (2) fragments of included schistose or slaty 
rock, often not very highly altered, caught up from the rock-masses 
through which the granite has forced its way. 
3. “Certain Geological Facts witnessed in Natal and the Border 
Countries during Nineteen Years’ Residence.” By the Rev. George 
Blencowe. Communicated by the Rev. H. Griffith, F.G.S. 
Shales and sandstones are the prevalent rocks from the coast for 
about twenty-four miles inland. Here is a protrusion of granite; 
beyond the sandstones come ferruginous shales, with scattered 
boulders of trap on the surface. The northern third of Natal is 
white sandstone, formed into hills and ridges by denudation, with 
a long trap-capped plateau near Helpmakaar. Coal-seams occur 
in the sandstones. There are frequent vertical pipes in these sand- 
stones which, the author thinks, mark the site of trunks of trees, 
round which the sand-beds had accumulated. Rorke’s House and 
Isandhlwana are near the above plateau. Near the former is an 
extinct mud volcano. A remarkable “ vitreous shale” is found near 
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