348 21. Ogilcie Gordon — Fauna of Upper Cassiaii, South Tyrol. 



Eaibler SchicLteu": Jabrb., 1S93). Hence, to continue to call tlie 

 ' Red Schlern Plateau ' series ' Lower Eaibl ' would undoubtedly 

 cause confusion. Tlie distinction of Upper, Middle, and Lower 

 Zones in a series of 'Kaibl strata' (using tbe term in tbe now 

 wider sense given by von Wohrmann), migbt be locally possible, 

 but at tbe present time it is more important to arrive at a clear 

 presentation of tbe complete series of palceontological zones in each 

 Alpine locality. Tbus in South Tyrol we have : 



LEADING FOSSIL-TYPES 

 iu the "Wengen-Cassian-Kaibl series (' Eaibler -Sch.' iu wider sense, von Wohrmanu). 



All pass into the 



Calcareo - dolomitic 



f acies in South Tyrol ; 



von Eichthofen's 

 ■* ScHLEKN Dolomite.' 



( ' Torek '-Eaibl Zone: Ostrcea montis caprilis, Mega- 

 lodus triqucter, etc. (diverse local developments of 

 volcanic marls and sand, limestone, gj'psum, dolomite). 



' Eed Schlern Plateau ' Eaibl Zone : Fachycardia 

 Hatien, Myophoria Kefersteinii, Myophoricardium 

 lineatum, etc. (diverse local developments of volcanic 

 sand and calcareo -dolomitic facies; molluscan faunas 

 contain almost exclusively Eaibl species). 



Upper Cassian or Transitional Tuff Zone: Avicula 

 Sturi, Tofancc, and Cortinensis, Pectoi Zandranus, 

 etc. (diverse local facies of Upper Cassian series, 

 containing a mixed fauna of Cassian and Eaibl 

 species). 



Stuoees-CassianZone: Koninckina Zeorihardti, Cardita 

 - cremxta, ■ Nucidw'strigiiata (tufaiceous,- marly, aad 

 calcareous series, containing almost exclusively 

 Cassian species) . 



"Wengen Zone : Halobia Loinmeli, Mdnophyllitei 

 Wengensis, Trachyceras^ Archelaus, Fosidonomya 

 Wengensis, etc. ; series of shales and limestones, 

 L grits, tuffs, and lavas. 



SUIMMARY. 



(1) Conformably above strata containing the typical or Stuores- 

 Cassian fauna as known before my paper of 1893, and below any 

 palfeontologically well-defined Eaibl horizon, so regarded before 

 von Wohrmaun's paper of 1893, I found in Falzarego Valley in 

 1891 a series of tufaceous breccias, shales, and quartziferous sand- 

 stones, containing a transitional Cassian-Eaibl fauna, and passing 

 upward into interstratified dolomite, dolomitic limestone, and volcanic 

 sand and marl, or into a wholly dolomitic group of strata. The 

 latter I termed ' Schlern Dolomite,' stating it to be tbe time- 

 equivalent in part, or wholly, of the 'red Schlern Plateau fossiliferous 

 strata' which von Wohrmann had iu 1892 called a Lower Eaibl 

 zone in South Tyrol. Eevised identifications of my Falzarego 

 Valley material, carried out in accordance with the recent special 

 monographs on Alpine Molluscan faunas by Dr. Bittner, Dr. Kittl, 

 Dr. J. Bohm, and others, have fully corroborated the palasontological 

 position which I gave to tbe fauna in 1893-4 as a local ' tuff' facies 



