32 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Catopterus is indeed absent, but a possible offshoot from the 

 ancient Palseoniscoids is found in the Pachycormid genus Urolepis, 



Thus far we have been able to trace a certain similarity or 

 at least a not remote correspondence, between our local 

 " Newark " fish fauna and various assemblages belonging to the 

 Upper Muschelkalk and Lower Keuper of the European marine 

 Trias. Extending now the range of our comparison to a higher 

 horizon, the fact cannot be gainsaid that there is in these later 

 Mediterranean fish faunas appreciably less resemblance to that of 

 the Atlantic border. The next higher horizon with which com- 

 parison of this nature is possible is the Hauptdolomit of various 

 parts of Austria and Italy, a formation which is homotaxial with 

 the Anglo-German Upper Keuper (Steinmergelkeuper), and is 

 immediately succeeded by the Rhaetic. Everywhere in this later 

 horizon, however, we meet with a more advanced expression of 

 piscine evolution, and the character of the fauna acquires a 

 decided Liassic aspect. We have, in fact, passed the limital 

 division of the Keuper with which our " Newark " fish fauna can 

 be most satisfactorily correlated, the ulterior bound being the 

 Raibl beds of the Lower Keuper. This tends, therefore, to con- 

 firm the conclusion already put forward that the Triassic fish 

 fauna of eastern North America is of more or less manifold 

 nature, and corresponds in a general way to the interval between 

 the uppermost Muschelkalk and the basal division of the Keuper 

 in the Mediterranean region. 



A tabulation of the Upper Keuper fish fauna of southern 

 Europe is offered at this point by way of illustrating its more 

 advanced grade in the scale of development. This has been 

 compiled from both the older and more recent literature, in- 

 cluding the writings of Kner,^ Deecke,^ de Zigno,^ Bassani,* 



1 Kner, R., Die fossilen Fische der Asphaltschiefer von Seefeld in Tirol. Sitsungs- 

 ber. Akad. Wiss. fVien., i865, liv, pp. 303-334. Nachtrag. Ibid., 1867, Ivi, pt. i, 

 pp. 898-909. 



2 Deecke, W., Ueber Fische aus verschiedenen Horizonten der Trias. Palaeontogr. 

 1889, XXXV, pp. 97-138. 



' De Zigno, A., Pesci fossili di Lumezzane in Val Trompia. Mem. R. Accad. dei 

 Lincei, 1891, anno 287, pp. i-io. * 



* Bassani, F., Sui fossili e sull' eta degli schisti bituminosi di Monte Pettine 

 presso Giffoni Valle Piana in Provincia Salerno (Dolomia principale). Mem. delta 

 Soc. Ital. delle Sci. (detta dei XL), 1893, ser. 3, ix, no. 3. Idem, La Ittiofauna 

 della Dolomia principale di Giffoni (prov. di Salerno). Palaeontogr. Italica, 1895, i, 

 pp. 169-210. — Idem, Elenco dei Pesci fossili degli schisti bituminosi triasici di Giffoni, 

 nel Salernitano. Rend, delta R. Accad. delle Sci. di Napoli, 16 Dec. 1899. 



