Structure of the Eastern Alps. 365 



This Neue-JVelt is filled with deposits like those of Gosau, the lowest beds 

 of which are thrown up into a nearly vertical position against the face of the 

 Wand ; but the superior marly beds are lost in the narrow valley underneath 

 great masses of detritus. Instructive sections are seen at Stahrenberg- and 

 near the village of Dreystetten^ where the following groups of strata,, in the 

 ascending order, are piled up vertically against the mountain side. 



1. Reddish calcareous conglomerate alternating with calcareous grit. 



2. Blue, impure, arenaceous limestone with Tornutcllu g/gantea, Nerinea, &c. 



3. Reddish calcareous grit. 



4. Bluish, gritty limestone, with the above fossils, and one very small species of Tornatella. 



5. Dark-coloured marls with shells, amongst which are a Fusus, a minute Turritella, a small 

 Cerithium, and a Venus, all of species found at Gosau. Of the bivalves, one resembles P/zc«/z//« 

 aspera*, also found at Gosau, and another appears to Mr. J. Sowerby almost undistinguishable 

 from Cyclas ciineiformis\ of the Woolwich tertiary beds. 



These marls and marlstones, dipping rapidly to the east, are soon lost under 

 hillocks of alluvium and pebbles, which cover the surface of the Neue-Welt, 

 and conceal the relations of the higher shelly strata to the lower ridge of 

 Alpine limestone on the east side of the valley. 



Near Meyersdorf blue, micaceous shale and marl crop out at the foot of the 

 Wand from beneath a heap of fallen fragments. In these beds we detected 

 minute, flattened specimens of a Placentula ? (Ijamarck.) It has been stated 

 that Lituolites are found near this place, but we could discover no traces 

 of them. 



The best exhibition of the overlying strata in this region is obtained by a 

 section from the south-western face of the Wand to the village of Griinbach, 

 in the narrow transverse valley of that name;};. 



The Alpine limestone with which the section commences has a brecciated 

 structure, is semi-crystalline, and of a pinkish hue, so as very much to resemble 

 the Salzburg marble found on the north side of the Untersberg. It graduates 

 into a grey limestone forming small conical bosses, containing two or more 

 species of Hippurites, a Sphaerulite or Radiolite, and a singular, attached shell, 

 which at first sight might be mistaken for a Nautilus, but has been proved, 

 by means of a polished, transverse section, to be a bivalve];. 



* Plate XXXVIII. fig. 7. t Min. Con. Tab. CLXII. fig. 2. & 3. 



X See Plate XXXVI. fig. 13. 



§ M. Deshayes, who has seen these fossils, states, that of the Hippurites two species are 

 entirely new ; that the Sphaerulite or Radiolite is also a new species, but that analogous speci- 

 mens are found in the cretaceous or upper green-sand formation of Angouleme ; and that the 

 attached bivalve (which is found also in the hippurite-rock of the Pyrenees) must probably be 

 formed into a new genus. 



