FOREIGN CORRESPONDENCE. 
477 
VII. — Retzia kadialis. Phillips, sp. PI. xii., fig. 13. 
Terebratula radialis, Pliillips, Geology of Yorkshire, vol. ii., p. 223, pi. xii., 
figs. 40, 41 ; Retzia radialis, Dav. Moii. Carb., p. 87, pi. xvii., figs. I'J, 21. 
A single crushed example of this small speeies from Scotland has come under 
my examiuatiou ; it was (U'rivcd from the (Jarboniferous sliales of the neigli- 
boiirhood of Lesmahago by Dr. Slimon. Wlieu perfect it possessed a longi- 
tu(lin;d oval siiape, with valves almost equally and moderately convex. The 
beak is produecd and truncated by a small circular foramen, which is slightly 
separated from the hinge line by a suiall hinge area. Each valve; is ornamented 
with about twenty small rounded, radiating ribs, of which the central one In 
the dorsal valve is at times the largest, and to which, in the ventral one, cor- 
responds a deepened sulcus. 
(To be continued.) 
FOREIGN CORRESPONDENCE. 
By Count Marschall, of Vienna. 
On Fossil Vertehrata. By Professor E. Suess. Bead hrfore the. 
Imperial Geological Institute of Vienna, Feb. 8, 1859. 
M. Gastaldi has recently published an essay on the fossil Verte- 
brata of Piedmont, especially on the Mammals found in the coal of 
Cadibona, which he and Prof. Michelotti consider to be of Lower 
Miocene age ; while Prof. Sismonda and Dr. Rolle think the shells 
occurring in it to be rather of Eocene character. The upper portions 
with Tetralopliodon Arvernensis, Hippopotamus major, &c., are called 
Pleistocene by M. Gastaldi, while Dr. Falconer has evidently proved 
them to be genuine Pliocenes like the deposits of the Arne-valley, 
the Auvergne (partly), and the mammaliferous Crag of England. 
As it is still to be proved (according to Prof. Heer's deductions) that 
physical changes must necessarily have affected in the same degree 
the inhabitants of the dry land as they did those of the sea, much 
confusion would be avoided by using local denominations (Amo-, 
Eppelsheim-, Cadibona-fauna, &c.,) instead of hypothetical geo- 
logical terms (as miocene, pliocene, &c.). M. Gastaldi's excellent 
descriptions and figures have materially contributed to give clearer 
notions of Anthracotherium magnum, Anthr. minimum, Ampldtragulus 
communis, Rhinoceros minutus. Eh. incisivus ; the last species is still 
doubtful. 
The Swiss lower Molasse, the coal of Kovencedo, near Vicenza, 
and probably some other more eastern deposits may be coeval with 
those of Cadibona. The remains of Bhinoceros from the brown-coal 
of Hart, near Gloggnitz, belong to a smaller species not occurring 
VOL. u. X X 
