. 
OLDER TERTIARY OF KIEF, BUTSCHAK, ETC. 
285 
Map, to show, that such Nummulite rocks occur in the Crimcea, where they 'were 
first described by one of us, subsequently by M. Dubois 1 , and also by M. Huot, 
though we are ignorant of their existence in the continent ot Russia. 
Let us pass then to the consideration of beds which every one will admit to be 
of tertiary age. We regret that in travelling through the northern part of Poland 
we had not time to make adequate researches among the tertiary rocks which lie 
between the Prussian frontier and Warsaw, where deposits of brown coal and clay 
are associated with white calcareous claystones (Kolin to Kola), in which we 
observed casts of Pectens and other shells. There can, indeed, be little doubt, 
that the accumulations of this zone, often highly argillaceous, are connected with 
the tertiary deposits of the Russian frontier upon the same parallel of latitude, 
which, occurring in the environs of Grodno and around the marshes of Pinsk, 
extend to Kief and to the south-east of that city. In the tract between Grodno 
and Kremenetz they have been described by M. Eichwald 2 , as plastic clays and 
sands with brown coal, and beds with freshwater shells, which immediately sur- 
mounting the white chalk, are succeeded by shelly limestones. 
The banks of the river Styr near Lutsk, and of the Goryn, offer numerous ex- 
amples of these beds. M. Eichwald compares them with the plastic clays and 
sands of the Paris basin, hut as he gives no specific names to the organic remains, 
we must pass at once to the adjacent country around Kief, where clear evidences 
have been observed. 
In and about the city of Kief itself, clays, sandstone and shelly bands, which 
have been described by Professor Hoffmann 3 , are characterized by a Centhium 
closely allied to the C. giganteum, and an Ostrea which we cannot distinguish from 
the 0. callifera (Goldf.), and hence we are led to believe, that they belong to the 
older tertiary age. 
This inference is, indeed, completely sustained by the contents of similar strata 
at the adjacent place of Butschak on the river Dnieper, where M. Dubois collected 
many shells which have been accurately determined by M. v. Buch, according to the 
following list which the latter has kindly communicated to us. 
* See Voyage au Caucase, en Armenie. en Crimes, etc.. voLv.; and Series v. of Illustrations pi. 14 
Also Voyage dans la Russie Mend, et la Crimee. vol. ii. ; and Memoire sur la Cnmee. par M. de Verneuil, 
Mem. de la Soc. Gdol. de France, vol. iii. p. 17-2o* 
2 Naturkistorische Skizze von Lithauen, V olhynien und Podolien. 1 na, 
s We have not with us whilst we write the publication of M. Hoffmann. The Kief section was, how- 
ever examined hy one of our own party. Count Keyserling. 
2 v 
