Field Note. 41 
and metallurgical industries, ports, fisheries, and communica- 
tions ; prehistoric Yorkshire ; the Roman occupation ; Saxon 
and Danish Yorkshire; mediewval Yorkshire; architecture ; 
place-names and languages ; Old Whitby as a port, and river 
development. The course concluded with two lectures on - 
the teaching of geography by Mr. W. P. Whelpton. The 
practical work included the reading and enlargement of topo- 
graphical maps, the examination of typical rocks, the making 
of models and microscope sections, field surveys, and the 
reading and construction of meteorological charts. Frequent 
excursions were made to places of geological and industrial 
interest in the neighbourhood, and an afternoon was devoted 
to the study of a typical Yorkshire farm, with large-scale 
plans showing the rotation of crops on each field for the past 
four years. 
-O: 
Yorkshire Marine Mollusca.—Since writing the account 
of the marine mollusca of the Yorkshire Coast, chiefly as 
represented in the Hull Museum, for the meeting of Yorkshire 
Naturalists at Hull, in December last,* I have found several 
new species which I have added to the Hull collection. In some 
shell sand which I got at Scarborough on December 7th, of 
1912, I found Lepton nitidum v. pisidiale, Eulima bilineata, 
Astarte sulcata, Nuculana tenuis, Goodallia triangularis, Also in 
examining some shell sand from Bridlington, obtained on 
March 7th of this year, I found Lepton nitidum v. convexum. 
These two varieties of Lefton mitidum are remarkable for their 
very curious and beautiful sculpture. Neither they nor 
Nuculana tenuis appear to have been hitherto recorded for 
our coast. Besides these, while looking through some unsorted 
Odostomias obtained at Scarborough at the annual meeting of 
the Marine Biological Committee in 1911, I found a rather 
worn specimen of Aissoa inconspicua. This species, though I 
have found it in abundance at Torbay, does not appear to have 
been found on this coast before. It is not unlike some forms 
of Rissoa parva v. interrupta, but may be distinguished, inter 
alia, by the peculiar sculpture and the pink tip of its spire. 
In shell-sand obtained at Filey, August 31st, I discovered a 
fragment of Philine angulata, a shell not, I think, recorded 
before on the Yorkshire Coast, and in shell-sand from Scar- 
borough, September 23rd, a rather broken specimen of the 
beautiful Montacuta substriata. I have also added a specimen 
of Eulimella mitidissima obtained from Scarborough, February 
13th, 1912, and confirmed the identification of Pyrgulina 
decussata, which was already in the museum under that name, 
but which I had not given in the Hull list—F. H. Woods. 
*See Trans. Hull Sci. and Field Nat. Club, Vol. 4, pt. v. pp. 231-250. 
£913 Dec. 1. 
