STRATIGRAPIIICAL GEOLOGY. 495 



Rhatic formation. Mojsisovics, who had in 1869 placed the 

 Hallstatt limestone partly in his Noric and partly in his Karnic 

 division of the Trias, shortly after discovered Ptychites 

 Studeri and other Cephalopod species characteristic of Alpine 

 Muschelkalk in red marble and limestone on the shores of 

 the Lake of Hallstatt. Further discoveries near Hallein and 

 Serajewo established a considerable extension of this facies 

 of Upper Muschelkalk. To the same horizon Mojsisovics 

 referred the Muschelkalk strata of Sintwang near Reutte, the 

 Triassic Cephalopods of the black limestone in the Himalayas, 

 and a number of Ammonites from Spitzbergen and Eastern 

 Siberia, which have been described in monographs. The 

 Hallstatt fauna was also found in Transylvania in 1875 and 

 afterwards in California and other localities, hence it became 

 abundantly clear that the name of " Juvavic Province" was no 

 longer suitable for the Hallstatt area, since the characteristic 

 fauna, instead of having been confined to a small area in the 

 Austrian Alps, had apparently been widely distributed in the 

 vast ocean of the Upper Triassic epoch. Correlatively, the 

 "Mediterranean Province" lost its value, and Mojsisovics in 

 1892 found it necessary to give up these supposed biological 

 provinces of the Alpine Trias. 



Bittner had made considerable collections of fossils in the 

 limestones of the Hagen mountains, the Hohe G611, and at 

 Hernstein in Lower Austria. After examination of these 

 fossils in 1882 and 1884, he recognised the fossiliferous 

 limestones in which they occur as interbedded in the 

 Dachstein and Main Dolomite series. From the fossil 

 resemblances Bittner supported the opinion of Stur that the 

 Hallstatt limestone was an equivalent of the Dachstein 

 limestone and Main Dolomite. Mojsisovics verified Bittner's 

 observations and at the same time stated that the so-called 

 Zlambach strata were only argillaceous, lenticular intercalations 

 in the " Noric " Hallstatt limestone. But as the supposed 

 position of the Zlambach strata at the base of the Hallstatt 

 limestone had been the security previously given for the 

 inclusion of part of the Hallstatt limestone in the Noric 

 division, the position of that portion of the limestone was 

 now rendered doubtful. Mojsisovics thereupon transferred 

 the " Noric limestones " of his earlier systematic arrange- 

 ment of Upper Trias (cf. p. 487) to a position above the 

 Karnic division. The name of " Juvavic," which had proved 



