CLASSIFICATION OF MARINE TRIAS 397 
Juvavites. These beds may represent the Tuvalic substage, from 
the prevalence of /Jwvavites of Tuvalic type, although the zone 
fossil, Zropites subbullatus was not found in this horizon. They 
may, on the other hand, represent the base of the Juvavic stage, 
since Professor Hyatt™ cites from Hosselkus limestone of Plumas 
county Rhabdoceras and Halorites, neither of which is known 
below the Juvavic stage in the Alpine region. It may be, how- 
ever, that here again we have an immigrant fauna reaching this 
region earlier than other known regions. 
BAJUVARIC SERIES. 
The Bajuvaric series is typically developed in the Tyrolean 
Alps, where it is divided into the Juvavic and Rhetic stages. 
The fauna of the Juvavic stage has been described by Mojsisovics 
in ‘Das Gebirge um Hallstadt,” and that of the Rhetic by vari- 
ous authors. 
Juvavic faunas have further been described from Asia Minor, 
Pamir, Afghanistan, the Himalayas, New Caledonia, and Peru.” 
In California the upper part of the Hosselkus limestone may 
belong to the Juvavic stage, as has already been stated in this 
paper, since Rhabdoceras and Halorites occur in it. 
The Rhetic is so little known in its marine facies that all 
attempts to refer foreign marine strata to this horizon have failed. 
The cephalopod faunas of Rhetic age thus far known are very 
meager, and there is no way of comparing distant localities with 
each other. 
CONCLUSION. 
It can no longer be said that the Alps furnish the typical 
region even for marine Trias; each region of the earth seems to 
have some open-sea development of a stage that is lacking else- 
where, and new explorations bring to light each year faunas that 
were unknown before. Each new discovery holds out to us the 
* Bull. Geol. Soc. Am, Vol. III, Jura and Trias at Taylorsville. 
2 For the literature of the Juvavic stage see Mojsisovics, Denksch. K. Akad. Wiss 
Wien. Bd. CIV, Abth. I, p. 30, 31. 
