an average rate of seven feet \ er annum, and this means that a constantly changing 
section presents itself. With the exception of small post-glacial lacustrine deposits, 
which occur in hollows in the Boulder Clay, the whole area consi i;ts of glacial 
debris. At Dimlingion, where the clifi's are over 150 feet high, there is a magnifi- 
cent series. In the lower part of the cliff, and on the beach, are exposures of the 
Basement Boulder Clay, the oldest of the glacial beds. This is a lead-coloured 
deposit, containing large numbers of transported marine shells of an Arctic type 
(generally broken) ; and a good proportion of Scandinavian erratics, Above it is 
the Middle or Purple Boulder Clay, with the Teesdale and Lake District rocks, 
usually striated, and also containing numerous Liassic and Cretaceous fossils which 
are different from those occurring i7t slttc in Yorkshire. They have probably been 
derived from outcrops in the bed of the North Sea. The Upper or Hessle Clay is 
of a loose texture, and a foxy-red colour. Its contained erratics are few and small, 
but contain a very large proportion of Cneviot and Scottish rocks At Dimlington 
is the best section of Boulder Clay in Yorkshire, and on the beach hereabouts is the 
greatest variety of rock species to be found anywhere in the British Isler». 
BOTANY. — The Botanical Section will be officially represented by Mr. J. F. 
Robinson. 
Flowering Plants — Mr. J. F. Robinson writes : — The known flora of Spurn 
and Kiln.sea with- their sea and estuarine coasts, contains, amongst many others, 
the following, all of which have been recorded in " The Flora of the East Riding 
of Yorkshire " : — Cakile ?naritima, Erodiuni moschatum, T. scabrum, P^icia 
lathyroides, Rosa rubiginosa, Eryngiufn maritimum, Apium graveolens, AtUmisia 
7naritivia, Staiice Liffioniuin^ Blackstonia ( Chlora ) perfoliata. Volvulus Soldanella, 
Cuscuta epithytnum^ Atriplex portul uoides, Salicojnia herbacea, Suceda niaritima 
(the last three on the Humber shore), Hippophae rhamnoides (the " dune-thorn" and 
chief shrub at Spurn), Ophrys apifera (the Warren), Ruppia rostellaia 2,ndi Zostera 
marina in tidal pools, Phletim arenarium, Ammophila arundinacea, Agropyrum 
juncettm, and Elymus arenarius, the last four, all grasses, help very materially to 
bind the sand together. The following should be sought for: — Tkalictrtim 
collinum^ Glaucium Jlavum, Cochlearia danica, Crambc maritima, Astragalus 
danicus, /uncus compressus, J. baliicus, Ammophila baliica, etc.. all of which have 
places in the British Flora, but not all, as yet, in that of the East Riding. 
Mosses and Hepatics — The Yorkshire Bryological Committee will be 
officially represented, 
Mr. J. J. Marshall writes : — Very little information regarding the bryology of the 
district to be investigated is available. At the 1898 meeting at Withernsea and 
Spurn, Tortula ruralis var. arenicola and Bryum atropurpureum with Tortula 
papulosa, and Orthotrichu?n affine were gathered. A sharp look-out for the rare 
Bryum which grows on Coatham Marshes and in various estuaries on the east 
coast, should be kept. 
Marine Algae. — Mr. T. Fetch, B.A., B.Sc, records Corallina officinalis^ 
Chondrus crispus, Porphyra vulgaris, Ulva latissima, and several others as growing 
on the Den, and Cladophora sp. in the Zostera pools. 
Amongst the rejectamenta have been found the commoner Fuci^ including 
Halidry: siliquosa, and the red forms Delesseria atata, D. sinuata, Rhodymenia 
ciliata, Griffithsia setacea, Plocamiufn coccineum, Polysiphonia fastigiaia^ P. 
ni^rescens, etc. . 
Diatoms. — Mr. R. H. Philip writes : — Some good gatherings should be made 
from the algoe in shv^re pools on the Humber side of the peninsula. I have found 
here Aciinocyclus Roperii, Actinoptychus uudulatus, Biddulphia auriia, B. iurgida, 
Grammatophora oceanica, Melosira sulcata, Navicula Bombus, N. didyma^ 
N. humerosa, N. liltoralis, Pkurosigma Balticumy Raphoneis amphiceros^ SurireUa> 
gemtna^ etc. 
