298 Proceedings of Societies. 
fessor Harkness. On some Phenomena connected with the Drifts of 
the Severn, Avon, Wye, and Usk, by Rev. W. 8. Symonds, which we 
give in full at page 281. On the Pleistocene Deposits of the District 
about Liverpool, by G. W. Morton. Notice of some Facts in Relation 
to the Postglacial Gravels of Oxford, by Professor Phillips. On a 
New Bone-cave at Brixham, by W. Pengelly. Remarks on the Bone- 
caves of Craven, by T. W. Barrow. On the Red Crag Deposits of 
the County of Suffolk, by W. Whincopp. Paleontological Remarks 
upon the Silurian Rocks of Ireland, by W. H. Baily. In this paper, 
the author noticed the occurrence of Llandello flags in the county of 
Meath containing the characteristic graptolite Didymograpsus Mur- 
chisonw, and then proceeded to give a general review of the localities 
in Ireland from which fossils were obtained, as affording satisfactory 
evidence of the various sub-divisions of the Silurian rocks at present 
ascertained in that country. On the Geology of Knockshigowna, county 
Tipperary, by A. B. Wynne. On the Granite Rocks of Donegal, and 
the Minerals associated therewith, by R. Scott, M.A. On the Gold of 
North Wales, by T. A. Readwin. Comparison of Fossil Insects of 
England and Bavaria, communicated by Mr Sainton, by Dr Hagen. 
Section D. (Zoology and Botany) had for its president C. C. Babington 
who did not give any formal opening address, but permitted the audience, 
soon after meeting, to listen to Professor Owen, who read two papers, Of . 
these the first was on the “ Cervical and Lumbar Vertebre of the Mole,” 
illustrated by diagrams of the structures described. The result of the 
paper was to show that the vertebral column of the mole combines two 
peculiarities which are separately given in the reptilian class,—viz. to the 
crocodilia and enaliosaura respectively, a curious fact not hitherto noticed 
in any systematic work or monograph in comparative anatomy. The 
Professor afterwards read a paper on some objects of natural history from 
the collection of M. Du Chaillu, of which the following is a summary. 
Professor Owen’s first knowledge of the zoological collection was derived 
from a letter sent by M. Du Chaillu, dated Gaboon, June 13, 1859, and 
received in the British Museum in August 1859, in which M. Du Chaillu 
specified the skins and skeletons he had collected, offering them for sale, 
with other varieties, to the British Museum. Professor Owen replied, 
recommending the transmission of the collection to London for inspection, 
with which recommendation M. Du Chaillu complied, bringing with him 
all the varieties he had named, with other objects of natural history, from 
which he permitted selection to be made. The skins of the adult male and 
female of the young of the Troglodytes Gorilla afforded ample evidence 
of the true colouration of the species. In the male, the rufo-griseous hair 
extends over the scalp and nape, terminating in a point upon the back. 
The prevalent grey colour, produced by alternate fuscous and light grey 
annuilations of each hair, extends over the back, the hair becoming longer 
upon the nates and upon the thighs. The dark fuscous colour gradually 
prevails as the hair extends down the leg to the ankle. The long hair of 
the arm and foream presents the dark fuscous colour ; the same tint extends 
from below the axilla downwards and forwards upon the abdomen, where 
the darker tint constrasts with the lighter grey upon the back. The scanty 
hair of the cheeks and chin is dark; the pigment of the naked skin of the 
face is black. The breast is almost naked, and the hair is worn short or 
partially rubbed off across the back, over the upper border of the iliac bones, 
in consequence, as it appears, of the habit ascribed by M. Du Chaillu to the 
great male gorilla of keeping at the foot of a tree, resting its back against 
the trunk. The skin of the great male-gorilla, as mounted in the British 
Museum, exhibits two opposite wounds,—the smaller in front on the left 
