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travelled that district, visiting nearly all the quarries from 
Burton Bradstock, and Bridport, in the south, to the hills 
beyond Sparkford, in the north, and from East Coker in the 
west, to Milborne Wick, in the east, and the result of part of 
this work was the arrangement of the beds into zones entirely 
on my own investigations, which differed in many points from 
the opinions previously expressed about those deposits, and one 
of the chief of these points was that the Humphriesianum zone 
was most partial in its development, and that most of the beds 
which had been placed in it belonged in reality to the Sowerbyi 
and also partly to the Murchisone zones. 
Taking the zonal arrangement which Dr Wright has given 
for Cleeve Hill, and applying it to the beds which we are 
now discussing, we see that according to him the Parkinsoni 
zone would extend down to the bottom of the beds with 
Gryphea sublobata, or even lower. Then below this down to the 
top of the Oolite Marl he includes in the Humphriesianum 
zone. Now the Ammonites which I have obtained from the 
beds between the Gryphea Grit and the Harford Sands are 
species with which I am well acquainted, and of which I pos- 
sess numerous examples from the Sowerbyi zone of Bradford 
Abbas and its vicinity. Furthermore from the Gryphea Grit 
of the Stroud district Mr Witchell has shewn me a fine series 
of Ammonites, all of which I recognise as belonging to the 
Sowerbyi zone, ‘‘the fossil bed” of Bradford Abbas, and 
therefore I cannot agree with placing the Gryphea Grit in the 
Parkinsoni zone, nor with placing the beds below in the Hum- 
phriesanum zone. I would rather divide the beds in the fol- 
lowing manner:—Beds C. D., that is to the bottom of the 
Upper Trigonia Grit, I would place in the zone of Am. Parkin- 
soni. Beds E. F. G., that is down to the top of the Harford 
Sands, I would place in the zone of Am. Sowerbyi, and there- 
fore it is my opinion that the zones of Am. Humphriesianum 
and Am. Sauzei, which we find so well represented in the 
neighbourhood of Sherborne, Dorset, are totally unrepresented 
in the Cotteswolds, so far as our present knowledge extends, 
just in the same way as they are in Dorset and Somerset 
