TRANSLATIONS AND NOTICES 



01" 



GEOLOGICAL MEMOIRS. 



On the Fossil Molltjsca of the Vienna Basin. 

 By Dr. MoRiz Hoknes. 



[Die fossilen Mollusken des Tertiarbeckens von Wien. Von Dr. Moriz 

 Homes. Lief 15 & 16. Noticed in the Jahrbuch der k.k. geol. Eeiehsanstalt, 

 1864, pp. 509-514.] 



These parts contain the families Lucinidce, Erycinidce, Solenomyadce, 

 Crassatellidce, Carditidte, Naides, Nuculidce., and Arcacece. The species 

 are distrihuted in the following manner : — 



Diplodonta y^otundata and D. triyomda, both now living in the 

 Mediterranean, and on the coasts of Madeira and the Canaries 

 occur in Tertiary sands. Lncina (including the genus Codakia, 

 Scop., which has been merged into Lucina, on account of its 

 structure) 19 species. The species which most frequently occur, 

 and sometimes abundantly, are L. Columbella, Lam., and L. ornata, 

 Ag. The former of these is eontined in Europe to the Miocene 

 (Lower Neogene) deposits. Some specimens of it, together with 

 some other characteristic form?s, found by Prof. Doderlein in the 

 Subapeunine deposits near Modena, prove this formation to be of 

 Miocene age, but so intimately connected with the Upper Pliocene 

 beds that they are scarcely separable. 



Lepton, 2 sp., and Erychia, 5 sp., all of them very minute, mostly 

 in the yellow sands of Potzleinsdorf. 



Solenomya Doderleini, Mayer, very much resembling the living 

 Mediterranean S. Mediterranea, Lam., extremely scarce, and exclu- 

 sively confined to the Plastic Clay of Ottnang (Upper Austria). 



Crasmtella llardeyyeri, Horn., C. Momvica, Horn., and O. concen- 

 trica, Diij., all of them oceuriing in the coarse and loose sands of 

 Gnusbach, in the Moravian portion of the Vienna Tertiary basin. 

 This genus, the 34 living species of which are eminently tropical, 

 after having reached a high degi'ec of development during the Eocene 

 period (24 species occur in the Eocene beds of the Paris basin), 

 nearly disappeared in the course of the Miocene period. 



Crirdita, 14 species, most of them in the marly strata of the 

 Leithakalk (Neogene). Among thera C. trapezia, C. calycu- 



VOL. XXI. PAKT II. D 



