KENDALL : PRESIDENTIAL ADDRESS. 
177 
The Millstone Grit has by no means escax^ed attention, even 
though the shattered state of the country and the rarity of good 
land marks in the series have rendered the study one of con- 
siderable difficulty. Tute's work on the Cayton Gill beds has 
added much to our kno^^iedge of the fauna besides giving a new 
datum in the stratigraphy ; and the discovery of a great fauna 
in the shales of Eccup and Mr. G. V. Wilson's researches in 
Wharfedale have sho\\n that the shales, if not mainh^ of marine 
origin, certainly contain many important marine beds. 
The Yoredale Rocks, and more particularly^ the Pendleside 
series that some geologists consider to be contemporary with them, 
as they admittedly are homotaxial, have been studied b}' Tidde- 
man, Hind, Howe and Johns. 
The Carboniferous Limestone exacted very close and careful 
attention from Prof. Hughes and his colleagues on the Geological 
Survey, but though very diligently studied, no striking new facts 
in Palaeontology were discovered. The late Prof. Lohest attempted 
a general correlation with the series on the Meuse, but nothing 
like a definite zonal classification was practicable. Some twelve 
years ago, however, a young geologist, well-known in this Society, 
was seeking a subject for original research to be prosecuted 
under the tenure of a University Scholarship : on my advice, he 
offered what to me was a very promising theme — the zonal study 
of the Carboniferous Limestone. It seemed to me that there could 
be no more favourable field for such an enterprise than our 
Yorkshire Dales where these rocks ydeld magnificent exposures 
as every one here knows. 
The proposition was submitted to the authorities, but was 
rejected on the apparently adequate ground that the Carboni- 
ferous Limestone was one and indivisible from top to bottom, 
and therefore that any attempt to zone it was foredoomed to 
failure. Had the Committee displayed a more sanguine and less 
conservative spirit, who knows but that instead of an " Avonian " 
sequence, the type might have been the " Cravenian." It is no 
use indulging in vain regrets, and we may be unreservedly thank- 
ful that a ge?lh^ arose in the south to give us the clues that we 
wanted. Dr?mrthur Vaughan, working in the Bristol area, 
found that the Carboniferous Limestone could be zoned, but on a 
different principle. from that applied to other cases. 
