SECTIONS OF WHITE LIMESTONE AT KOLOMNA, KASIMOF, ETC 
(. Productus , Eichw.), Spirifer Mosquensis, Productus antiquatus (the variety without 
concentric stride), Melania rugifera (Philh), Euomphali, with fragments of small 
Trilobites, Reteporse, &c. 
At Romano vo and Lublino the limestone appears again in force, but at the latte 1 
place, in a thickness of 150 feet, the red and green marls have to a great extent 
disappeared ; whilst a little further on they reappear, and below Rostshielaf a rock 
of brick red sandstone is intercalated between calcareous marl and limestone, the 
whole reposing on beds with Spirifer Mosquensis. Other bands ol white marl and 
limestone range onwards to Kolomna, one bed of which contains the corals Sir om- 
bodes pentagonus, Cheetetes radians and Cyathophyllum, and another the Cidaris 
Rossicus (V. Buch.). These strata rest upon a mass of Spirifer limestone. The 
white limestone which is here quarried for building, is equally associated, as in 
the neighbourhood of Moscow, with a yellow, magnesian variety like that of 
Miatchkova and other places near the metropolis ; which is usually employed as a 
road-stone. 
In making allowance for the undulation of the strata and also for the thinning 
out of some layers and the reciprocal substitution of limestone for marl and sand- 
stone, and vice versd, we believe that the Oka, in its course from Serpuchof to 
Kolomna, exposes, on the whole, a descending section, and therefore that the lime- 
stone of the latter place is the lowest stratum of this section. For although no 
perceptible inclination can be detected in the strata, at the greatei numbei of the 
spots cited, there is a rise to the north, from the angle where the river flows north- 
wards towards Kolomna. We also draw our conclusion from the manner in whic i 
the limestone near Serpuchof is surmounted by much red earth, a 
from the succession of fossils; for in the upper portion of the c 
shirov, the Orthis eximia is abundant and characteristic, and we slial alterwarc s 
show that this shell is never found in the lowest limestone, but is, on tie y ’ 
associated with Fusulime, in the limestone which we consider superior 
we are now describing. „ , , . 
With this central member of the carboniferous limestone we grout 
which extend southwards and eastwards to Riaizan and Kasmio . n 6 ’ 
however, it is at rare intervals, and, as usual, on the sides of the wato-counra i , 
that the rook can be seen. Near the post-house of Gorodn.a, south 
and on the banks of the Oceta river, we detected wh.te ” S " P 
wards of 1 00 feet thick, associated with courses ofblack, grey and yellow flmts 
