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SOME NOTES ON THE HOLOCENE DEPOSITS AT 
NORTH FERRIBY. 
C. W. AND E. V. WRIGHT. 
After the preliminary report on the Ferriby Peat deposits 
by Mr. Bisat in the Trans. Hull Geol. Soc., for 1030, we made 
several examinations of the series at lowest spring tides and 
were fortunate in discovering a swamp deposit containing 
many fresh-water, mollusca. 
Beyond the Ferriby Sewer outlet the base of the low cliff 
of peat is not exposed until the peat thins out several hundred 
yards to the east. Here we noticed a bed of sandy peat 
containing shells ; upon investigation the following section 
was noted, the swamp evidently occurring in an extensive 
hollow of the boulder clay. 
The diagram is not to scale. The shells occur abundantly 
in the beds bracketed and fragments in the Green Seatearth. 
Of the following photos, for which we are very much 
indebted to Mr. G. W. Mason, the top one shows the sandy 
peat (2), the grey marl (3), and the white tufaceous marl (4). 
Shells can be seen in the photograph. The bottom one shows 
an interesting rise in the tufaceous marl. 
The following is a list of shells from the sandy peat, kindly 
determined by Mr. Musham. 
Cepaea nemoralis Clausilia laminata 
Arianta arbustorum Zua lubrica 
Hyalinia cellaria 
Pyramidula rotundata 
Carychium minimum 
Pupa cylindracea 
Succinea elegans 
Valvata crist at a 
Paludestrina stagnalis 
Planorbis spirorbis 
Mr. A. S. Kennard has also very kindly identified a large 
number of snails from the grey marl collected by Mr. Bisat 
and ourselves and gives the following report on them. 
Report on the Non Marine Mollusca (A. S. Kennard, 
Thp Naturalist 
