Per mo -Carboniferous Ammonoids of the Glass Mountains 39 



indicates that these strata may also correspond to some part of the 

 Sosio beds. 



Kossmat has also indicated that there seems to be a great similarity 

 between the strata of Mrzla-Vodica and the cephalopod-bearing shales 

 of St. Girons in the Pyrenees which are known to contain Daraelites, 

 Gastrioceras and Paraceltites. Unfortunately, these fossils are not 

 well preserved- and the fauna might as well correspond to that of the 

 cephalopod-bearing sandstone of the Artinsk as to that of the Sosio 

 beds. 



Very little is known about the cherty beds of Spitzbergen and 

 Barent Island, which are considered by Freeh as belonging to the 

 Permo-Carboniferous. The only ammonoid known from that part is 

 Agathiceras and as this genus occurs as well in the uppermost Carbon- 

 iferous as in the Permian, it does not prove anything. 



Some ammonoids have been described by Diener from the upper- 

 most Permian (Bellerophon limestone) of the Alps. All these be- 

 long to the genus Paralecanites which is found also in the Triassic 

 of California. Haug has pointed out the near relationship between 

 Paralecanites and Nomismoceras and we have been able to show that 

 a form from our Leonard formation may also belong to Paralecanites. 

 Thus this tribe probably begins in the Carboniferous and ends in the 

 Triassic. There is no doubt that the main bed of Paralecanites be- 

 longs to the uppermost Permian. 



We shall now turn our attention to the relation which might exist 

 between our faunas and those of the Permian of Asia. There are 

 several localities known where ammonoids have been described. These 

 are Darwas and Woabjilga in Central Asia, the Himalayas, the Salt 

 Range of India, several localities in China, the Island of Timor, and 

 Djulfa in Armenia. The faunas described from these localities range 

 from the Permo-Carboniferous to the uppermost Permian. We shall 

 try to discuss their relations to the European and American faunas 

 beginning with the oldest of them. 



Karpinsky established the fact that the fauna of Darwas is synchron- 

 ous with that of the cephalopod-bearing sandstones of the Artinsk. 

 The fauna is composed of the following species : 

 Pronorites praepermicus Karp. 

 Propinacoceras darwasi Karp. 

 Agathiceras uralieum Karp. 



