274 
TH5«.GE0L0GIST. 
Siliceous — 
Peroxide of iron 
Carbon.ate of lime 
2.5 
23.5 
74.0 
Silica, with a little alumina . 
100. 
Whether any connexion can be traced between these last two and 
the two former, I leave for others to decide. 
The following list of books may perhaps be useful to those who wish 
to further investigate the subject : — In 
Professor Phillips' Geology of Yorkshire, 
Young and Bird's Survey of tlie Yorkshire Coast, 
Dr. Fitton's Memoir of the Strata below the Chalk, 
Taylor's Hunstanton Cliff (PhO. jMag. vol. Ixi.), 
Woodward's Geology of Norfolk, 
Rose on the Geology of West Norfolk (Phil. Mag. for the years 1835 and 1836), 
will be found some account of the English Red Chalk. And in 
Sedgwick and Murchison on the Structure of the Eastern Alps (Geol. See. 
Trans, vol. iii. Second Series), 
Sir. R. I. Miircliison on the Geological Stracture of the Alps (Quart. Geol. 
Journal, vol. v.). 
Prof T. A. Catullo on the Epiolitic Rocks of the Venetian Alps (Quart. Geol. 
Journal, vol. vii.). 
Count A. de Zigno on the Stratified Formations of the Venetian Alps (Quart. 
Journal Geol. Soc. vol. vi.), 
will be seen an outline of the Scaglia or Red Chalk of Italy. 
By the kindness of Dr. Bowerbauk, Messrs. Wetherell, Bean, 
Leckenby, and Rose, in permitting me to see the specimens in their 
respective cabinets, and to whom, as well as to Mr. Rupert Jones, 
I must express great obligations for miach valuable information, 
the accompanying list of the Red Chalk fossils of Speeton, Hun- 
stanton, and Muswell Hill has been compiled. To the Council of the 
Geological Society, 1 have been also indebted for permission to figure 
from the Society's Museum the luoceramus Crispii, in the Proceedings 
of the Geologists' Association. 
