168 Abstracts of Foreign Memoirs. 
which was published in 1834, and in which the name ‘ Trias’ was 
first given to this formation. 
The author divides his subject into three portions, to each of 
which he assigns a special chapter. In the first chapter he treats of 
the various groups composing the Swabian Trias, coupled with 
remarks on the mineralogical components and contents of the rocks, 
chiefly from a geological point of view. In the second part of the 
work he describes the organie remains of the Triassic strata, inclu- 
ding some new species of Mollusca, giving figures of the latter, and 
of some of the former that have not been adequately illustrated 
before. In the third chapter he discusses the distribution and range 
of the fossils in the Trias of Swabia and other countries, and com- 
bats some of the published classifications of this group for the Alps 
and other districts. 
The following is the classification he adopts :— 
SWABIA, &e. ALPS. 
C. Keuper. 
cc. Upper Keuper. 
Upper Dachstein. 
p. Tabingen Beds . malta - Kossen Beds. 
Lower Dachstein. 
Bleiberg Beds. 
bb. Middle Keuper. 
o. Coarse-grained Sandstone. 
nm. Gansingen Beds. : 
m. Fine-erained Sandstone. Foes: 
i, MKeuper-gypsum. 
: an Esino Beds. 
Arlberg Limestone. 
Hallstadt Limestone. 
k, Cannstatt Beds , ° 2 » St. Cassian Beds. 
Wengen Beds. 
Partnach Beds. 
Mendola Dolomite. 
aa, Lower Keuper or Lettenkohlengruppe. 
2. Upper Dolomite. 
h, Lettenkohle and Sandstone, 5 
g. Gypsum and Rocksalt, @) 
jf. Lower Dolomite. 
B. Muschelkalk. 
Virgloria Limestone. 
Guttenstein Limestone. 
Recoaro Limestone. 
d. Anhydrite Group, . . Gypsum of the Muschelkalk of Lom- 
bardy. 
e. Friedrichshall Limestone . 
Campiler TBeds 
: Seiss Beds. 
A. Bunter. 
} Grodner Sandstone. 
ce. Wellenkalk ‘ f 
b. Upper Bunter Sandstone. 
a, Vosges Sandstone. 
The author states that in the Trias there are four principal 
