84 Reviews — Heer’s Primceval World of Sicitzerland. 
Palgeozoic slates. A fine series of fish remains from these beds may 
be seen in the Geological Collection of the British Museum. 
No fewer than fifty-three species of fish have been identified and 
described, together with two Sea-turtles and two Birds. We subjoin 
a figure of one of the turtles. 
Fig. 4. Fig. 5. 
F ig. 4. Chelone ovala, Heer, from Matt, one-third nat. size. (Fig. 141 , p. 248, Heer.) 
Fig. 5. Chelone imbricata, living Hawk’s-bill Turtle. (Fig. 142, p. 248, Heer.) 
The birds ( Protornis Blumen, Heer, and P. glaronensis, Meyer) 
were about the size of Larks, and appear to have belonged to the 
family of Finches. 
The Glaris slate-rock is the oldest of these Swiss Tertiary deposits. 
and, like the beds of Monte Bolca, is of Middle Eocene age. Above 
it is the Nummulitic formation of Balligstöcke, and the newest, the 
shales of Mauremont, Soleure, and Obergüsgen, containing remains 
of no fewer than twenty-five genera of terrestrial Mammalia, together 
with t welve Keptilia represented by Chelonias, Ophidia, and Crocodilia. 
Nearly one-fifth of the area of Switzerland (about 152 square 
geographical miles), comprising the lowland, undulating country 
between the Jura and the Alps, is covered by masses of marls and 
sandstones, which have received the general name of “ Molasse,” 
and include all the formations of Middle Tertiary or Miocene age in 
this area. These deposits are of great thiclmess, and rise on the 
borders of the Alps into considerable mountains, such as the Speer 
(6021 feet) and the Bighi (5541 feet). To the south the ‘Molasse’ 
is stopped by the zone of ‘ Flysch ’ and the Nummulitic deposits ; it 
touches the Cretaceous rocks only in a few localities. To the north 
