46 Reports and Proceedings—Geological Society of London. 
REPORTS AND PROCHEHDINGS. 
is 
GxoLogicaL Socrery oF Lonpon. 
T.—November 21st, 1906.—Sir Archibald Geikie, D.C.L., Sc.D., 
Sec, R. S., President, in the Chair. 
The following coeamaunieatione were read :— 
1. ‘The Kimeridge Clay and Corallian Rocks of the Neighbour- 
hood of Brill (Buckinghamshire).” By Arthur Morley Davies, 
AURA. S., Bre. Eylr-0 
The paper contains two principal divisions :— 
(1) An account of the section of Rid’s Hill, Brill. At the 
‘summit are Lower Portlandian sands, not well exposed; below 
these comes a thickness of about 50 feet of Upper Kimeridge Clay, 
with only one small exposure of grey shale containing black lignite 
and a few fossils. At the foot of the hill, a large brickfield shows 
‘the following sequence :— 
Feet. 
s Grey, creamy-weathering clay (zone of Exogyra virgula) .. Aa 4 
. Grey, creamy-weathering clays with crushed shells, darker and 
slightly selenitic towards the base Sc ... about 17} 
6, 5, & 4. Two bands of creamy limestone, with marly clay between 
(Pietonia cf. Cymodoce, Pholadomya equalis) ... 4 
3. Dark grey, brown-weathering clay, with occasional phosphatic 
nodules... 8 
2. Black shaly clay, weathering Tilac- grey with yellow stains, highly 
selenitic (Belemnites abbreviatus, B. nitidus, Ostrea deltoidea, 
Gryphea dilatata, Trigonia Voltzii, etc.) ‘ . 14 
1. Band of grey limestone (Perisphinctes decipiens, Tri igonia Juddiana) 
at the base. 
There have also been dug up, probably from the selenitic clay 
(No. 2), doggers composed largely of Serpula tetragona, Sow., and 
Arctica (Cyprina) cyreniformis (?), Blake, yielding many other fossils, 
including Cardioceras alternans (von Buch) and Belemnites nitidus, 
Dollf. The possibility of the selenitic clay being Ampthill Clay is 
discussed, the conclusion being that only Lower “Kimeridge Clay is 
exposed in this section. 
(2) The rock of Studley and Arngrove, described by Phillips as 
an argillaceous chert, is shown to be mainly composed of the globate 
spicules of the tetractinellid sponge Rhaxella. It has a much more 
limited extension eastward than the geological map would suggest ; 
but, on the other hand, it is found to form part of the outerop of 
normal Corallian rocks from Waterperry by: Stanton St. John to 
Holton Wood. Its exact relation to the Oxford Clay is deseribed, 
and an increased list of fossils is recorded from it. 
Paleontological, notes are given on certain species of Lamelli- 
branchia and Annelida, chiefly from the Lower Kimeridge Clay. 
2. “On the Skull and greater portion of the Skeleton of Gonzo- 
pholis crassidens, from the Wealden Shales of Atherfield (Isle of 
Wight).” By Reginald Hooley, F.G.S. 
In the late Autumn of 1904, at a place locally called ‘Tie Pits,’ 
near Atherfield Point, a huge mass of the cliff, comprising many 
thousand tons of the Wealden Shales, subsided, pushing its foot 
