﻿166 Notices of Memoirs — Dr. Neumayr — On the Russian Jura. 



ever, a coherent group of beds, mainly belonging to the upper sub- 

 division of the Carboniferous group, thus representing a sea-coast 

 fades, nearly equivalent to the dry land fades of the Upper Carbon- 

 iferous sub-division abounding in vegetable remains. 



B. From Borneo. 



The Fusulina-limestones of this island are represented by two 

 varieties (probably from different horizons), differing both litho- 

 logically and paleeontologically. 



1. The prevalent variety is a somewhat siliceous limestone, un- 

 equally speckled with light-yellowish and reddish-grey colours, 

 intersected by white and reddish veins and fissures, and abounding 

 in large spherical Fusiilincs. These occur nearly complete, and some- 

 what silicified ; or appear in various sections on the surfaces altered 

 by decomposition. The prevalent form, with numerous whorls of 

 the spiral, is essentially different from the form figured by Mr. 

 Brady ^ as Fusulina princeps, Ehrenb. sp., showing (like the large 

 spherical forms from Carinthia and Carniola) only six whorls. 

 The new species, externally similar to the four-whorled Carinthian 

 F. Hoeferi, St., is F. VerheeM, Geinitz, characterized by the presence 

 of from ten to twelve whorls. 



Some sections are referable to AlveoUna, or to a genus nearly 

 allied ; being types of a new species, AlveoUna (?) atavina. 



2. The second variety of Fusulina-rock is a variegated and 

 generally fine-grained breccia, including some spherical forms, and 

 very many sections of more abundant, smaller, cylindrical, thick- 

 fusiform or oblong-oval individuals, varying in dimensions. Accord- 

 ing to the position of analogous calcareous breccias in the Southern 

 Alps, these Bornean breccias may belong to an horizon immediately 

 above that of the first variety. 



C. From the Isle of Chios. 

 According to Mr. Teller, the Fusulina-limestones here appear so 

 widely spread in the form of blocks and smaller fragments, that 

 they may be supposed to be a rather important constituent in the 

 geological structure of this island. These limestones are grey, and 

 include an abundance of broken stems of Crinoids, together with 

 rather frequent, large, and elongated Fusulince, standing next to the 

 Carinthian F. Suessi, St., and to the American F. elongata, Shum. 

 Certain reddish and yellow portions of the limestone, rather sandy 

 and argillaceous, exhibit on their decomposed surfaces several smaller 

 forms of Foraminifera. 



Ill- — On the Jueassic Fokmations of Eussia. By Dr. Neumayk. 

 From the Eeports Imperial Geological Institute Vienna, October, 1876. 



[Communicated by Count Marschall, F.C.G.S.] 



SEAM of earthy brownish coal, with coniferous wood, resting 



on limestone, considered to be Devonian, is worked at Tchoul- 



kowo, south of Moscow. The coal-seam is overlain by a bed of clay 



with pyritized Cephalopods characteristic of the lowermost Jurassics. 



1 Geol. Mag. New Series, Yol. II. p. 637, PI. XIII. Fig. 6. 



A 



