Clement Reid— Glacial Deposits of Cromer. 55 
Murchisonia, from which it is distinguished by the possession of the 
second channel. In the only living genus channeled in the same 
manner, the groove is known to result from a deep notch in the 
outer lip, and it is therefore likely that the aperture, which is not 
preserved, would have been found to be angulated and doubly 
notched. : 
In general form the shell very closely resembles the spire of 
Anchura carinella, even to the apical whorl and the slightly produced 
last whorl—but neither the cast nor the shell of the latter presents 
the slightest trace of grooves. 
The specimen is unique, and J am indebted to Mr. Meyer, to whom 
it belongs, for the opportunity of describing it. 
While it is scarcely probable that many more species will be 
added to the Molluscan fauna of the Gault of Folkestone, where 
alone this formation has been systematically worked, the Blackdown 
fauna, from the number of unique and rare shells already obtained 
from it—a unique shell sometimes being the sole representative 
of a family—gives promise that it may still yield many more forms. 
EXPLANATION OF PLATE III. 
Fic. 1. Tessarolax oligochila, Gard., Colln. British Museum. 
» 2. TLessarolax, sp. nov., Colln. J. F. Walker, Esq., M.A., F.G.S., etc. 
», 93. Helicaulax opeatochila, Gard., Colln. British Museum. 
» 4. Tridactylus Watkeri, sp. nov., J. F. Walker, Esq., M.A., F.G.S., ete. 
» 0. Disoketa Meyeri, Gard., gen. et sp. nov., Colln. C. J. A. Meyer, Esq., F.G.S. 
» 6. Scalaria, sp. noy., Colln. British Museum. 
» @. Sealaria Keepingi, sp. nov., Colln. J. F. Walker, Esq., M.A., F.G.S., ete. 
», 8. Fry of Aporrhais, Colln. British Museum. 
I]l.—Tue Gractat Deposits oF Cromer. 
By Crement Ren, F.G.S., 
of H.M. Geological Survey of England and Wales. 
[Communicated by permission of the Director-General of the Geological Survey.] 
-TJP\AKING into account the large number of papers that have been 
published on the Glatial Deposits near Cromer, any further 
description may appear unnecessary ; and it was with this impres- 
sion that I commenced the systematic examination of the coast three 
years ago. Before long, however, I found that in many important 
points the actual facts do not support the accepted theories of the 
origin of the deposits; and having now made a thorough examina- 
tion, I lay the results before the reader." 
Literature of the Subject.—The first description of the contorted 
beds near Cromer was published in 1824 by R. C. Taylor.? In 1827 
Taylor published three papers “On the Geology of East Norfolk,” 
etc.2 Mr. Samuel Woodward in 1833, in his “ Geology of Norfolk,” 
gave a long description and sections of the Cromer cliffs. The next 
was by Lyell, in the same year, in the first edition of his “Principles,” 
and in 1840 he gave a still fuller account. No description either 
1 This paper was read before the Geological Society, but only published in abstract. 
2 Phil. Mag. vol. xii. p. 81. ; f 
3 Ibid. 2nd ser. vol. i. pp. 277, 346, 426. 4 Tbid, 3rd ser. vol. xvi. p. 346, 
