FORTY-SIXTH ANNUAL REPORT, FOR 1907. 
23 
repay the trouble. A small Pleiirotojiia, perhaps a young- specimen 
of P. rufa^ and a Philline pniuwsa, I had not found on the Yorkshire 
coast before. On June 15th a visit of the Hull Scientific and Field 
Naturalists' Club was planned to Filey, but owing to the stormy 
weather it practically fell through. I was, however, during the 
intervals between the thunder showers, able to secure considerable 
additions to those found at Robin Hood's Bay, among them a fine 
specimen of Trochus zizyphimiSy which I had not met with before 
on the Yorkshire coast. I have since examined, under a lens, 
specimens of shore drift which I have obtained from Filey^ 
Bridlington, and Scarborough. The last proved remarkably rich. 
Among more than 50 distinct species I found specimens of two 
species of Pleuroioina^ one of which I believe to be brachystoma, a 
Modiolaria costidata^ all new to me as far as this coast is 
concerned. The whole number of species which I have found 
on the Yorkshire coast already exceeds 80, and I have seen also 
one or two more which have been collected by others. 
What is very desirable is that a certain number of workers 
should study the coast systematically, and compare the results. I 
should be happy to give any help in my power by looking over 
collections and naming shells. But I am disposed to think that 
with inexperienced workers the results are better in the end if 
they work independently, to some extent, at firsts and get to 
recognise the species by sight, even if they cannot name 
them. The first thing for beginners is to realise the difference 
between the perfect shell with the mollusc in it and the empty 
shell, and the shell worn or calcined in different degrees ; and, 
again, between the mature and the young shell. These can be 
best appreciated by constant and persevering study. But those 
who have time to take the trouble will find the subject .very 
interesting. The two aims we should keep in view are: — (i) A 
complete list of the marine molluscs on this coast. (2) A collection 
of good characteristic specimens in the Hull Museum for reference 
by the conchological student. 
The following were elected for 1908 
Chairman— Dr. H. C. Sorby, F.R.S., Sheffield. 
Convener — Rev. F. H. Woods, Bainton. 
Representative on Executive — E. Howarth, Sheffield. 
Other Members— Rev. W. C. Hey, West Ayton ; G. Massee, 
Kew ; T. H. Nelson, Redcar ; S. Lister Petty, Ulver- 
ston ; J. Eraser Robinson, Hull ; E. W. Eierke, Hull ; 
W. Denison Roebuck, Leeds ; Arnold T. Watson, 
Sheffield ; and J. D. Butterell, Wansford. 
Yorkshire Botanical Survey Committee.— The Con- 
vener reports that the work of this Committee has made satisfactory 
progress during the year. The excursions which proved most useful 
were the July one to Thorne Waste and the August Bank Holiday 
