BIBLIOGRAPHY OF YORKSHIRE GEOLOGY. 
405 
93 Stopes, M. C, and D. M. S. Watson.— On the Present 
Distribution and Origin of the Calcareous Concretions in 
Coal Seams, known as ' Coal Balls.' [Halifax Hard Bed]. 
Phil. Trans. Roy. Soc, ser. B., vol. cc, pp. 167-218 ; 
Geol. Mag., dec. v., vol. vi., pp. 37, 38. 
94 Symons, B. — Genesis of Metallic Ores and of the Rocks 
which enclose them. [Cleveland ironstone noted, p. 154]. 
Pp. xxiii., 494. 8vo. London. Reviewed in Mining 
Journ., vol. lxxxiv., p. 406. 
95 Teall, J.J. H. — Summary of Progress of the Geological 
Survey during 1907 [noticed in Geol. Mag., 
Aug., 1909. Pp. 373-5]. 
96 Turnbull, J. — Presidential Address, 1907. Proc. Dar- 
lington and Teesdale Nat. Field Club, vol. i., pp. 13-21. 
97 Coal and Coal Formation. Ibid., pp. 40-48. 
98 Vaughan, A.— [See C. A. Matley]. 
99 Watson, D. M. S. — The Cone of Bothrodendron mundum 
(Will). [Millstone Grit and Lower Coal-Measures, Hali- 
fax, etc.]. Mem. Proc. Manchester Lit. Phil. Soc, vol. 
lii., No. 3, pp. 16 ; Rep. Brit. Assoc. for 1907, pp. 690, 
691. 
100 ■ [See M. C. Stopes]. 
101 Wheeler, W. H. — The North Sea. Its physical charac- 
teristics, Tides, Currents, and Fishery. Pp. 41. Maps. 
Svo. London. [See 1907]. See Notice in Natural- 
ist, Dec, pp. 459-461. 
102 Wieland, G. R. — Historic Fossil Cycads. [Williamsonia 
gigas]. American Journ. Sci., ser. iv., vol. xxv., pp. 
93-101. 
103 Woods, H. — A Monograph of the Cretaceous Lamelli- 
branchiata of England. Vol. ii., pt. 5. [Protocardia, p. 
197, and Corbula angulata, p. 212, from Speeton Clay]. 
Pp. 181-216 ; plates xxviii.-xxxiv. Monogr. Pal. Soc, 
vol. lxii., for the year 1908. 
104 Woodward, A. S. — The Fossil Fishes of the English Chalk. 
Pt. 4, pp. 129-152 ; plates xxvii.-xxxii. Monogr. Pal. 
Soc, vol. lxii. 
105 Wroot, H. E. — Yorkshire Naturalists at Hampole [near 
Doncaster]. Brief geological notes. Naturalist, pp. 
380-384. 
