on corbicula fluminalis, its associates and distribution in britain
TRANSCRIPT
OWEN REES ON PTYCHODUS LATISSIMUS. 117
The following were elected ¥embers of the Association :
George E. Cooke, Esq.; William Alfred Duck, Esq.; HenryEnglish, Esq.; George Berringer Hall, Esq.; and Robert Swan,Esq.
The following Papers were read :-
1. ON CORBICULA FLUMINALIS, ITS ASSOCIATES AND DISTRIBUTIONIN BRITAIN.
By ALFRED BELL, ESQ.
(This Paper has been withdranm by permission of the Genera; Oommittee.)
2. NOTE ON SPECIMENS OF PTYCHODUS LATISSIMUS, FROM THECHALK OF GRAYS, ESSEX.
By OWEN REES, ESQ., F.G.S,
( Abetract.)
In a recent excavation in the great chalk pit at Grays, at adepth of seven or eight feet from the general level of the bottomof the pit, large specimens of Ptychodus latissimus had been found.The chalk in which these so-called palatal teeth occurred was verycompact, and much more valuable commercially than the chalk
of the higher beds.The following are the dimensions of some of the teeth :
The largest..... ....... 2tin. by Iiin.The next largest. ••••• 2lin. by 1lin.An average specimen Itin. by Ilin.The smallest O!in. by 0Mn.
The author bore testimony to the cordiality with which the lateMr. Meeson invariably welcomed any geologists desirous of examining the sections exposed in his extensive pits at Grays.
3. ON THE DIP OF THE CHALK IN NORFOLK, AND THE REMAINSOF OLD LAND SURFACES CALLED THE STONE-BED.
By the REV. JOHN (jUNN, M.A., F.G.S.
The dip of the Chalk from Norwich to Yarmouth is ascertainedby measurement of its surface from the high-water level at Norwichto Sir E. Lacon's brewery at Yarmouth, where on sinking anartesian well, the Chalk was found to be 526 feet beneath the high