228 Notes and Comments. 
DENTALIUM GIGANTEUM. 
In our issue for Feb. (pp. 35-36), we gave a figure of some 
specimens of Dentalium giganteu:» on a piece of Lias. It was 
then stated that on a certain horizion in Yorkshire this species 
was extraordinary plentiful. This was demonstrated at the 
recent meeting of the Yorkshire Naturalists’ Union, when 
huge slabs of rock, entirely covered with the shell, were seen 
strewn on the beach immediately north of Robin Hood’s Bay. 
Fortunately a fair sample, which is figured herewith, was 
Photo by Godfrey Bingley. 
Slab of Lias, with Dentalium giganteum. 
Robin Hood’s Bay. 
secured for a certain institution at Hull. It measures twelve 
by eight inches, and is about three inches thick. As will be 
seen from the photograph, the upper surface is thickly covered 
with the shell—which also occurs throughout the slab—several 
being visible on the underside. 
SIR H. H. HOWORTH AND GLACIAL NIGHTMARES. 
In the ‘Geological Magazine’ for June, Sir Henry H. 
Howorth is once again on the track of the glacialists. Of 
the general line of his argument we do not propose to deal, 
Naturalist, 
