PETERS HUNGARY. 25 



strata being coeval with those of Nellingin, Niirtingen, &c. in Suabia, 

 and with the Kb'ssen-strata of the Alps. 



Dr. Oppel has discovered the same stratum in Luxemburg, resting, 

 as in Suabia, on the red Keuper marls, and overlaid by blue Liassic 

 limestones. In this country, the localities of Dahlheim and Ellingen 

 afford the following fossils : — 



Sargodon tomicus, Plien. Cardium Rhseticum, Merian. 



Sphserodus minimus, Ag. Avicula contorta, Portl. 



Gyrolepis tenuistriatus, Ag. Mytilus minutus, Gold/. 



Saurichthys acuminatus, Ag. Pecten Valoniensis, Defr. 

 Schizodus cloacinus, Quenst. sp. 



Dr. Rolle has described the organic remains, occurring in the calca- 

 reous Bone-bed of Tabingen, which rests on the above-mentioned 

 yellow sandstone, and is overlaid by blue Liassic limestone. These 

 fossils are 



Hybodus sublsevis, Ag. Pleuromya Suevica, Rolle. 



H. minor, Ag. Cardium Philippianum, Bunk. 



Acrodus minimus, Ag. Astarte Suessi, Rolle. 



Saurichthys acuminatus, Ag. Leda Oppeli, Rolle. 



Sargodus tomicus, Plien. Lima tecticosta, Rolle. 



Gyrolepis tenuistriatus, Ag. Pecten Hekli, aV Orb. 



Serpula exigua, Rolle. Ostrea, sp. 

 Ammonites Hagenovi, Bunk. 



Dr. Rolle concludes from these fossils, that the Molluscan fauna 

 of this stratum bears a decidedly Liassic character, but the Ichthyo- 

 logic fauna is in some sort related to that of the Lower Triassic 

 beds. It may be inferred from these circumstances, that between 

 the Keuperian and Liassic epochs the destruction of the then 

 existing fauna had been neither sudden nor total, Triassic animals 

 disappearing, and Liassic ones taking their places gradually, deposit 

 by deposit ; so that Liassic Mollusca were coexistent with the last of 

 the Triassic fishes. The two memoirs, analysed in this notice, will 

 be of special interest for British geologists, the deposits considered 

 in them corresponding to the "Bone-bed" of England and Ireland 

 (Axmouth, Austcliff, Lisnagrib, &c, and to the " Portrush Beds"). 



[Count M.] 



On the Geology of a part of Hungary. By Dr. Peters. 



[Proceed. Imp. Geol. Instit. Vienna, August 1857.] 



Professor Peters, in continuing his investigations, commenced 

 around Pesth and Buda, as far south-eastward as Tokod, Domos, 

 and Perball, finds that this region comprises the western circum- 

 ference of the Pesth trachytic massif with great deposits of tuffs, 

 including near Gran Neogene marine shells, and, near Domos, lignites 

 and vegetable remains. Limestones, appearing partly close to tra- 

 chyte, partly in isolated hills amid the Tertiaries, are all of the 

 Dachstein series, and in some localities are overlaid by white Num* 



