FOREIGN CORRESPONDENCE. 



477 



VII. — Eetzia eadialis. PliiUips, sp. PI. xii., fig. 13. 



Terebratula radicdis, Phillips, Geology of Yorkshire, vol. ii., p. 223, pi. xii., 

 figs. 40, 41 ; Retzia radialis, Dav. Mon. Carb., p. 87, pi. xvii., figs. 19, 21. 



A single crushed example of this small species from Scotland has come under 

 my e:^amiaatiou ; it was derived from the Carboniferous shales of the neigh- 

 bourhood of Lesmaha^o by Dr. SHmon. When perfect it possessed a longi- 

 tuduial oval shape, with valves almost equally and moderately convex. The 

 beak is produced and truncated by a small cii'cular foramen, which is slightly 

 separated from the hinge line by a small hinge area. Each valve is ornamented 

 with about twenty small rounded, radiating ribs, of which the central one in 

 the dorsal valve is at tunes the largest, and to which, in the ventral one, cor- 

 responds a deepened sulcus. 



(To he continued.) 



FOREIGN CORRESPONDENCE. 



By Count Marschall, of Vienna. 



On Fossil Vertehrata. By Professor E. Suess. Bead hefore the 

 Imjperial Geological Institute of Vienna, Feb. 8, 1859. 



M. Gastaldi lias recently publislied 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. RoUe think the shells 

 occurring in it to be rather of Eocene character. The npper portions 

 with Tetralopliodon Arvernensis, Hippopotamus major, &g., 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 mammaliferons 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 (Arno-, 

 Eppelsheim-, Cadibona-fauna, &c.,) instead of hypothetical geo- 

 logical terms (as miocene, phocene, &c.). M. Gastaldi's excellent 

 descriptions and figures have materially contributed to give clearer 

 notions of Anthracotlierium magnum, Antlir. minimum, Amphitragul/ns 

 communis, Bhinoceros minutus, Bh. incisivus ; the last species is still 

 doubtful. 



The Sv^dss lower Molasse, the coal of Kovencedo, near Yicenza, 

 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. II. X X 



