GEOGRAPHIC RELATIONS OF TRIAS OF CALIFORNIA 779 
those of the Weekoceras beds of the Lower Trias, of the 7rachy- 
ceras and Tropites subbullatus faunas of the Tirolic series, and of 
the Pseudomonotts beds in the Arctic-Pacific region, makes inter- 
regional correlation a much easier task. 
The nomenclature of the table is that of Diener, Waagen and 
E. von Mojsisovics,* with the exception that Ladinic has been 
substituted for Woric, and Noric instead of /Juvavic, the contro- 
versy between Bittner and v. Mojsisovics having been settled 
by a committee of the leading Austrian geologists* agreeing to 
make this change, and by this recommendation being in part 
accepted by v. Mojsisovics. It is immaterial to American 
stratigraphers which names are used, but since the Alpine Trias 
is the type of the marine formation of this age we must use the 
original formational names given by the Austrian geologists, and 
in the original sense. It is, therefore, a cause for congratulation 
that the committee report has been so widely accepted, and for 
regret that E. von Mojsisovics is still inclined to cling to his 
new term /zvavic for the Hallstadt beds which he formerly called 
Noric. 
LOWER TRIAS. 
The Santa Ana limestone.—TYhe first Lower Trias recognized 
in California was found by Dr. H. W. Fairbanks in a hard black 
siliceous limestone on the west slope of the Santa Ana range, 
Orange county, California. The fossils were submitted to the 
writer,and proved to be: a trachyostrachan ammonite, not other- 
wise determinable, an undetermined brachiopod, and Pseudomo- 
nots aff. clarat. The ammonite makes the Mesozoic age probable, 
and the pelecypod makes almost certain the Lower Triassic age, 
for Pseudomonotis clarai is diagnostic for the Werfen beds, upper 
part of the Alpine Lower Trias. It seems quite possible that 
this formation in California may be the connecting link between 
the Mediterranean and the Oriental regions, for the furthest 
known eastward extension of the Mediterranean Lower Trias, 
* Sitzungsberichte k. Akad. Wiss. Wien. Bd. CIV. Abth. I. Dec. 1895. Ent- 
wurf einer Gliederung der Pelagischen Sedimente des Trias-Systems. 
2 Zur Ordnung der Trias-Nomenclatur. Wien 1808. 
