20 
CORALLINE CRAG. 
after the date of Mr. Oharlesworth’s paper Lyell speaks of the 
characteristic Crag bryozoa as corals.” 
Fig. 3. 
Fascicularia aurantium, M. Edw. 
Natural size. 
After the publication of Mr. Charlesworth’s paper there was a 
good deal of discussion as to the accuracy of his views. The 
controversy is now of little interest, but anyone wishing to follow 
it will find the titles of all the papers in the Appendix. It may 
be observed, however, that Lyell almost immediatel}^ accepted the- 
proposed names, maintaining, however, that both beds belonged 
to one period. A few years later Lyell* visited the Crag district, 
and was able to give a description of the marked unconformity 
between the two deposits. He, however, now agreed with 
Desnoyers in considering both beds to be contemporaneous with 
the Faluns of Touraine. The principal points of interest in his 
paper—as far as the Coralline Crag is concerned—are the full 
descriptions of the Sutton and Tattingstone sections, in both cases 
drawn up after special excavations had been made. 
Most of the papers about this date refer especially to the upper 
division, and the next advance is marked by the publication of 
the first part of Searles Wood’s Monograph of the Crag Mollusca.t 
In this monograph the author speaks of the Coralline Crag as 
Miocene, and of the Bed Crag as Pliocene, but on the completion 
of the work he inclined to refer both to the Pliocene period.{ 
From 1848 onward numerous monographs on the different 
classes of fossils in the Crag were published by the Palaeonto- 
graphical Society. Besides the splendid work on the Mollusca 
* On the Relative Ages of the Tertiary Deposits commonly called Crag,” in the 
Counties of Norfolk and Suffolk. Mag. Nat. Hist., n. ser., vol. hi. pp. 313-330. 
(1839.) 
f Palceontographical Society, 1848.---Introduction, p. v, 
X Ibid., 1856, pp. 301, 302. 
