Geological Society of London. 283 
I1.—April 25, 1883.—J. W. Hulke, Esq., F.R.S., President, in the 
Chair.—The following communications were read :— . 
1. “On the Skull of Megalosaurus.” By Prof. R. Owen, C.B., 
RES. keG.S. 
The specimens described in this communication were obtained by 
Edward Cleminshaw, Esq., from the freestone of the Inferior Oolite 
near Sherborne (Dorset) from some blocks which had been quarried for 
building-purposes. These were sent by him to the British Museum, ° 
where the remains have been developed. One block includes a great 
proportion of the right side of the facial part of the skull, the missing 
parts being the fore end of the premaxillary, the suborbital end of the 
maxillary, and the upper hinder pointed termination of the same bone. 
Ten teeth are preserved in the maxillary bone. Another block contains 
the outer side of the right mandibular ramus, with teeth, and with 
some other fragments. In a third block is the anterior part of the left 
mandibular ramus, with portions of the teeth. These remains were 
described in detail; and in conclusion the author discussed the bearing 
of these and ether Megalosaurian remains upon our knowledge of the 
structure of that animal and its affinity to existing Reptilia, and 
criticized some of the evidence on which the relationship of the Dino- 
sauria to birds is inferred, a relationship which he had suggested in 
1841, but upon grounds which appeared to him te be more satisfactory. 
2. ‘*Notes on the Bagshot Sands.” By H. W. Monckton, Hsq., 
F.G.S8. 
The author explained that his paper related to the series of Bagshot 
Sands on and around Bagshot Heath, which forms what is termed ‘‘ the 
main mass” of the Bagshot beds in the memoirs of the Geological 
Survey. 
The railway-cutting at Goldsworthy Hill, described in 1847 by Prof. 
Prestwich, is still the best type-section of the Middle Bagshot Sands, 
and the succession of strata seen there was illustrated by reference to 
newer sections near Ascot and Wellington College. It was pointed out 
that the most marked feature in this part of the series is very pure 
ereensand, containing casts of shells of Bracklesham species, that a 
pebble-bed* is found at nearly the same relative level over a large area, 
and that this pebble-bed forms the most convenient and natural line of 
division between the Upper and Middle Bagshot. 
The Upper Bagshot Sands were then described, and attention was 
drawn to the abundance of fossils in some of the higher beds. 
The author then referred to the correlation of the Bagshot beds with 
the Hampshire series, and stated his conclusion that the Middle Bagshot 
beds are of Middle Bracklesham age, whilst the Upper Bagshot Sands 
are nearly equivalent to the Lower Barton of Hampshire, and are in 
no way equivalent to the so-called Upper Bagshot Sands of Long Mead 
End. 
3. ‘Additional Note on Boulders of Hornblende Picrite near the 
Western Coast of Anglesey.” By Prof. T.G. Bonney, M.A., F.R.S. 
In the xxxviith volume of the ‘‘ Quarterly Journal” the author 
described a large boulder of Hornblende picrite which he had dis- 
covered near Pen-y-carnisiog. During an excursion last summer to 
Porth-nobla he had found in that neighbourhood at least eight more. 
