FAUNA OF llli: PROVINCE "1 l Hi: MEDITERRANEAN 111 



confusion into any Btratigraphical <>r genetic classification. We have nol yet 

 been able t<> find any Bucb • 



I \ ■ ich as have !><-<'n quoted above are nol bo exten- 



sively mixed a> ha> been claimed. The Hierlatz and Adneth limestones are, 

 cample, mixtures only <>i the faunas <>l' tli«' beds above the Angulatus bed ; 

 o-called psiloceran forms as occurring in them are due 

 to mistakes in identification, since these forms are >|p<'.irs or young <>«. Bpe< 



and the species cited as belonging t<> the Middle and 



I I. j are either radical forms <>i else morphological equivalents, like all 



-called anachronic forms which we have yel Btudied. A paper bj W B 



- very instructive in this connection, Bince he Pound in 1 1 » * - Rluetic n true 



inclusively li<>\\ favorable this region must have been for the 



mi forms. He al~<i was able i<> make oul and describe the 



Planorbis and Angulatus horizons, with a full list of species already described by 



Wahner and others, and, above tlii-. the Hierlatz horizon. 



ilso t'> accord perfectly with the theory <>l autochthonous 



If the Northeastern Alps \\« re the >< al of origin for the major portion of 



the radical forms <>f Arietidse, we Bhould naturally expecl t<> find in tlii^ province 



cal Hi'l zoiilogical relations which are Bhown in Table \ I . : namely, 



the lower formations and faunas throughout the Planorbis 



and Angulatus horizons, and an extraordinary number of radical Bpecies and 



their immediate allies, these also having in the Butures a incur ancient or ti 



■ than in Central Europe. An analdainic lamia made up of modified forma 



from other faunas would necessarily be shown either in the 



admix! move these horizons in case the sediments were similar and 



con tin i be in the non-appearance of new radical or progressive forma if 



were more varied and more distinctly separable, as in England 



an>l in tl •: the Rhone. 



■ was an analdainic fauna so far as the Arie- 



erned during the deposition of the upper beds of the Lower Lias. 



the deposition of the Angulatus beds, this was l>\ no mcana the 



with othei ich as the Lyto On the contrary, as has been 



already announced 1>\ Neuraayr, this province was the autochthonous home of 



unilv. and Neumayr'a opinion is at ronglj I bj the remarkable 



►ed from the Northeastern Alps l>\ Gey< r, II iu< r, and others, and 



Herbich from Siebenburgen. The Lytoceratidoa are 



-■•ni from the faunas of the Lower Lias in Central Europe, though 



nd in tin- Middle and Upper Lio I I 



/'hi I i lie same author, are 



apparently members o) tlii* family, found in the Oxynotus bed of the basin of the 



: 

 : 



