52 FIFTY YEARS GEOLOGICAL RESEARCH IN THE BRISTOL DISTRICT. 
lations formed during periods of slow sedimentation, and did not 
require any special theory for their explanation. A sequel to Mr. 
Wickes' paper on the Rhaetic Bone-bed was that on ' Pebble- 
swallowing Animals • 1 ( 1 908) . 
Mr. Richardson has described the Rhaetic Rocks of the South 
and West of England in a long series of papers. The field of 
some of these lies outside our area, but attention may be drawn 
to the following : ' Notes on the Rhaetic Rocks round Charfield ' 2 
(1904), ( The evidence for a non-sequence between the Keuper and 
Rhaetic Series of North- West Gloucestershire ' 3 (1904), 'The 
Rhaetic and Contiguous Deposits of West, Mid, and part of East 
Somerset' 4 (1.911). 
It is impossible to allude to more than a fraction of the papers 
on the Jurassic Rocks which Mr. Richardson has published in the 
Proceedings of the Cotteswold Naturalists' Field Club and else- 
where. They include ' On the Inferior Oolite and contiguous 
deposits of the Bath-Doulting District' 5 (1907), 'On the top 
beds of the Inferior Oolite at Rodborough Hill, Stroud <6 (1907), 
' On the section of Lower Lias at Hock Crib, Fretherne ' 7 (1908), 
' On the Inferior Oolite and contiguous deposits of the South 
Cotteswolds ' 8 (1910). Mr. Richardson either alone or in associa- 
tion with Mr. E. T. Paris, has also contributed several papers on 
the palaeontology of the Jurassic rocks of the South-West of 
England. 
Dr. A. Vaughan in collaboration with Mr. J. W r . Tutcher 
described the Lower Lias of Keynsham 9 (1902), while Mr. 
Tutcher summarized the information available on the subject 
in his paper on 'The Lower Oolites near Bristol' 10 in 1903, and 
described the Liassic and Rhaetic Rocks of the Filton and Avon- 
mouth railway 11 in 1908. The rocks of the Great W T estern branch 
line from Camerton to Limpley Stoke were described by Mr. H. B. 
Woodward in 1908, 12 by Mr. Winwood in 1908, 13 and by Mr. 
Richardson 14 in 1909. 
1 Proc. Bristol Nat. Soc, 4th ser., Vol. II, pp. 5-21. 
2 Geol. Mag., n.s., Dec. 5, Vol. I, pp. 532-535. 
3 Q.J.G.S., Vol. LX, pp. 349-358. 
4 Ibid. Vol. LXVII, pp. 342-392. 
5 Ibid. vol. LXIII, pp. 383-436. 
6 Proc. Cotteswold Nat. Field Club, Vol. XVI, pp. 71-80. 
7 Ibid. Vol. XVI, pp. 135-142. 
8 Ibid. Vol. XVII, pp. 63-136. 
^ Proc. Bristol Nat. Soc, n.s., Vol. X, pp. 3-55. 
10 Ibid. pp. 150-168. 
11 Ibid. 4th ser., Vol. II, pp. 5-21. 
12 Sum. of Progress of Geol. Surv. for 1907, pp. 155-157. 
13 Proc. Bath and Dist. Branch of the Somerset Arch, and Nat. Hist. Soc. 
(1908), pp. 195-197- 
14 Proc. Geol. Ass., Vol. XXI, pp. 97-100. 
