428 
BIBLIOGRAPHY OF YORKSHIRE GEOLOGY, 1920-21. 
By T. Sheppard, M.Sc, F.G.S. 
1920. 
Anon. — The North Riding, Some Minor Points [Notice of W. J. 
Weston's book ; see under 1919]. The Naturalist^ January, 
pp. 7-8. 
Carboniferous Zones. The Naturalist, January, p. 10. 
Type Ammonites [notice of S. S. Buckman's Monograph]. The 
Naturalist, February, p. 49 ; and July, p. 209. 
Mr. G. W. Lamplugh's Presidential Address : Source of Material : 
Distribution of Glacial Deposits ; Another Version. The 
Naturalist, April, pp. 115-117. 
Prehistoric Implements, Materials used [report of T. Sheppard's 
paper]. The Naturalist, May, pp. 146-147. 
Investigation of Yorkshire Rivers. The Naturalist, May, pp. 
150-151. 
Kettlewell : Past and Present [notice of J. C. Sowerbutt's volume]. 
The Naturalist, July, pp. 210-211. 
Hull Museum [Geological Specimen from Bridlington]. Museums 
Journal, March, pp. 150. 
Special Reports on the Mineral Resources of Great Britain. Vol. 
IX., Iron Ores (continued) [review of]. Geol. Mag., January, 
pp. 38-39. 
[signed A.S.]— Obituary : Wheelton Hind, M.D., B.S., F.R.C.S., 
F.G.S. Geol. Mag., October, pp. 476-480. 
Official Quarry Statistics. Quarry, March, pp. 53-54. 
Anderson, R. W. — A Few Notes on Coal-Dust Experiments. Trails. 
N. Eng. Inst. Mining and M. Eng., July, pp. 46-53. 
Arber, E. a. Newell [the late]. — On the Fossil Flora of the Southern 
Portion of the Yorkshire Coalfield. Part IL, Derbyshire. Proc. 
YorJcs. Geol. Soc, Vol. XIX., pt. 5, pp. 350-358. 
[Belinfante, L. L. ; edited by]. — Abstracts of the Proceedings of the 
Geological Society of London, Session 1919-20. Nos. 1043-1058, 
96 pp. 
Berry, Edward W. — Paleobotany : A Sketch of the Origin and 
Evolution of Floras. Ann. Rep. Smithsonian Institution for 
1918 [published 1920], pp. 289-407. 
