SECTIONS NEAR VITEGRA. 
75 
stone with coal-plants ; the latter being well seen in the cliffs at the month of the 
valley. 
/. Grey carboniferous limestone (sum- 
mit). 
e. Dolomitic limestone. 
d. Red and green mottled shale, with 
thin courses of limestone, in parts 
_ concretionary. 
«. Inferior sands, with Stigmiiriuficoides. 
The peculiarity of this section consists in a variety of magnesian limestone 
occurring at the very base of the calcareous group, and also in red and green 
mottled shale (d) being placed between the limestone and the inferior yellow sands 
(c). In the last respect, however, the lithological succession is pretty nearly the 
same as that seen on the Stolobna, in the Valdai Hills. 
To the east of Vitegra, in the flat ground between that place and the Mgra, the 
white limestone prevails, and at one small quarry we collected many fossils in beds 
of a yellowish and white, sandy limestone, pisolitic in some parts, and having 
very much the aspect of the oolitic tertiary deposits of Lower Styria 1 . Hei’e the 
Nautilus tuberculatus (Sow.) and Spirifcr Mosquensis (Fischer) abounded, with 
other fossils, among which we may here note Cardium elongatum (Sow.), Buccinum 
acutum (Sow.), with the Chcetetes radians and Lithostrotion jloriforme (Martin), and 
fragments of Terebratula, Natica, Turritella, Avicula, &c. 
Great masses of the limestone occur in cliffs on both banks of the river Vitegra, 
where it feeds the great canal Maria, at Dwytenskaya, the central station near the 
crest or watershed of this region before alluded to (p. 14). Again we found the 
Cluetetes radians and many fossils, including Leptcena Hardrensis (Phill.), Cicla- 
rites Beucalionis (Eichw.), and a new species of Natica which we have named 
N. Marioe. 
As our observations between this spot and the Dwina were confined to the vici- 
nity of the high road, the reader will not expect, particularly in a country of such 
monotonous outline, that we should be able to point out the exact order of each 
stratum. We must therefore content ourselves with stating, that a large region 
is composed of carboniferous limestone, different beds of which are exposed on the 
sides of the road which makes great flexures to the south-east or north-west. 
In the flat tracts east and west of Cargopol, the white limestone forms the sur- 
face, and disintegrating in many places into a fine gravel, is dug out by the 
1 See Trans. Geol. Soc. Lond., vol. iii. p. 397 (Sedgwick and Murchison). 
