188 
die Pseudomonotis-Schichten tiber den Kalken mit Tropites sub- 
bullatus. Es ist diese Beobachtung umso wertvoller, als von 
einigen Seiten die Richtigkeit der den Pseudomonotis-Schichten 
auf Grund des paléontologischen Befundes zugewiesenen 
Stellung in Zweifel gezogen worden war. 
Nach den neuen Untersuchungen des Prof. Perrin Smith 
gliedert sich die Trias in Shasta County, California, in 
folgender Weise: 
Lias of Squaw Creek, without Cephalopods. 
Unconformity 
Pseudomonotis subcircularis slates, with only a few fossils 
Spiriferina beds, hard siliceous limestone, 50 ft. thick, with 
few Ammonites. 
Juvavites beds, with J. cf. subinterruplus and J. group of 
Continui, many rotund Proarcestes sp. nov. and a few 
Tropites, group of subbullatus, about 200 ft. thick. 
Tropites beds with 7. subbullatus, T. torquillus, T. cf. Mor- 
loli, T. Sellai, T. Dittmari, Sagenites Herbichi, S. erina- 
ceus, Eutomoceras Sandlingensis, Clionites many species 
very abundant, Protrachyceras cf. Attila and many of 
other species; Proarcestes several species, Nautilus tria- 
dicus and many new species of Ammonites with some 
new genera; Halobia superba etc. This bed in about 
100 ft. thick. 
Upper Trias 
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Halobia slates with Halobia superba in great abundance. 
Protrachyceras Homfrayi beds, with Halobia cf. rugosa and a few 
Ammonites. About 50 ft. of dark clay slates. 
Middle] _ 
Trias About 1500 ft. of shales, with Ceratites, and Anolcites Whitueyt. 
Great thickness of conglomerates and eruptives amounting to 
several thousand feet, no fossils. 
Upper Carboniferous limestones, with Fusulina cf. longissima ete. 
