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Nummulfteshave been distinguished, some of which characterize the 

 lower or secondary strata at Sonthofen, Arzt, and Mattsee, others 

 together with a coral ( Nummulina complanata) prevail in the transi- 

 tion-tertiary groups of Kressenberg, Schweiger Mill, &c. Having 

 thus, both by superposition and by fossils, shown the existence on 

 the flanks of the chain of a deposit with a predominance of tertiary 

 and very few secondary shells, as distinguished from a lower group 

 in which secondary fossils prevail, the author proceeds to point out 

 accumulations of the same age, at various heights, within the great 

 secondary chain of the Alps. 



In the valley of Gosau several new facts are enumerated. The 

 edges of the shelly deposit are seen to rest on red sandstone, on 

 Alpine and Hippurite limestone, and on green sand. Besides the 

 underlying conglomerate *, the shelly system is considered to be 

 clearly divisible into two parts, of which the inferior contains many 

 secondary as well as tertiary fossils, with Tornatella (Turbinel- 

 lus, Sow.), Nerinea, rolled Hippurites, &c. ; whilst the superior blue 

 marls abound with myriads of shells of a tertiary aspect, and many 

 corals, of species figured by Goldfuss, from the tertiary formations 

 at Castel Arquato, Bassano, &c. 



As all the conchologists who have seen the unmixed shells of 

 these upper blue marls have declared that they belong to formations 

 newer than the chalk, the author conceives this case, therefore, to 

 be now established beyond dispute, both by stratigraphical and 

 zoological evidence : and he further is of opinion that the slaty 

 overlying psammites of the Horn and the Ressenberg clearly repre- 

 sent the molasse. 



A case of more extraordinary elevation than that of Gosau was 

 this year discovered by the author, in the Alpine pasturage of 

 Zlam above Aussee and Grundelsee, where blue marls with 

 Cerithea, sharks' teeth, &c, overlie calcareous grits and conglome- 

 rate, with Tornatella and Nerinea, and are carried up in a cleft of 

 Alpine limestone to at least 6000 feet above the sea. Several lo- 

 calities mentioned by Dr. Boue are then alluded to : Windisch- 

 garsten is a valley similar to Gosau, of which, according to the au- 

 thor, it exhibits only the lower shelly beds, and amongst the conti- 

 guous rocks on which these repose, are grits, fucoid shales, Hippu- 

 rite limestone, younger Alpine limestone, &c. 



Formations of the transition-tertiary age are then described on 

 three sides of the Wand, a mountain of Alpine limestone at the 

 eastern extremity of the Alps, where the author made various sec- 

 tions assisted by Mr. Partsch of Vienna. At Piesting Meyersdorf, 

 Dreystetten and Griinbach, they found that the shelly, blue marls 

 invariably occupied the same place in the series as at Gosau. At 

 Griinbach, the ascending order, as seen in vertical strata, is Alpine 

 and Hippurite limestones, green grit and shale, coal beds with 

 freshwater shells, nummulitic grit, marls with Gosau shells and 

 corals. In none of these sections could Mr. Partsch or the author 



* See former Memoir, Proceedings of Geological Society, p. 154. 



