﻿Notices of Memoirs — Br. Neumayr — On the Russian Jura. 167 



The Uj^per Jurassic division is represented by light-coloured glau- 

 conitic limestones, containing Cephalopods, G-asteropods, and Bra- 

 chiopods. Dr. Neumayr found the following fossils in the clay : — 

 JTarpoceras Brighti, Pratt ; H. lunula, Ziet. ; Ferispliindes scopi- 

 nemsis, sp. nov. ; P. Mosqiiensis, Fischer (a characteristic Eussian 

 form) ; Stephanoceras coronatum, Brug. ; Cosmoceras Jason, Ziet. ; 

 and C. Pollux, Rein. ; all in a state of preservation closely resem- 

 bling that of the fossils in the Ornatus-clays of Swabia. Of the 

 above-named seven forms, five are commonly met with in the Middle 

 and Upper Callovian of W. Europe, the zones of Simoceras anceps, 

 and of Perispliinctes athleta ; they must be considered as Immi- 

 grants ; and even the two others may be modified descendants (?) of 

 Perispliinctes curvicosta, a form widely spread over Central Europe. 



The Fauna of Tchoulkowo is exceptional among the Jurassic 

 Faunee of Eussia, both by its antiquity and by its striking analogy 

 to those of Western Europe. The Fauna from the red and yellow 

 Sandstones of Jelatma on the Oka is next related to it. 



The Eussian Jurassic formations, in descending order, are : — ■ 



a. Tnoceramus-bed of Simbirsk. 



b. Olive-green glauconitic sandstones, with Amaltheus catenulatus, 

 Fisch., and Perispliinctes fulgens, Trauts. 



c. Aucella-bed, with Amaltli. catenulatus, Fiscb., and Aucella Mos- 

 quensis. (Upper Moscow bed.) 



d. Beds witla Perispliinctes virgatus, von Buch. (Mid. Moscow beds.) 



e. Beds with Amaltheus alternans, von Buch. (Lower Moscow beds.) 

 /. Strata of Tchoulkowo and Jelatma, with Cosmoceras Jason, 



Ziet., and Stephanoceras coronatum, Brug. 



g. Pelemnite-shales of Jelatma ; besides several merely local 

 deposits. 



According to Dr. Trautschold, the division e answers to the de- 

 posits between the lowest "Bathonian" and the uppermost "Oxford- 

 ian ; " division d being the '• Kimmeridgian ; " and division e the 

 " Portlandian." 



Dr. Neumayr is of opinion that only ten species of West-Euro- 

 pean Cephalopods, all characteristic of the Middle and Upper 

 "Callovian" and of the Upper and Middle " Oxfordian," are met 

 with in the Eussian Jurassics, among which only the deposits of 

 Tchoulkowo and Galiowa can be paralleled with those of Western 

 Europe. The Fauna of the clays of Tchoulkowo and the equivalent 

 deposits of Jelatma answer exactly to that of the Upper and Middle 

 " Callovian," including a number of forms identical with those of 

 Western Europe. The horizon of Galiowa (division c) yields forms 

 refei'able to the zones of Aspidoceras perarmatum and Peltoceras trans- 

 versarium, together with some specially Eussian species. Some 

 forms of division d may be considered to be representative types of 

 Western forms, such as Perisphinctes virgatus, P. polyplocus, P. 

 PaVasianus, d'Orb., and P. Witteanus, Oppel. 



The divisions a, b, and c may be considered as equivalent to the 

 Uppermost Jurassics ; possibly division a may be even ranked 

 amons: the Cretaceous series. The concordance with West-Euro- 



