SANDBERGER — MAYENCE TERTIARIES. 13 



Pectunculus arcatus, Schloih. Teredo anguinus, Sant?^.*, boring' fossil 



Limopsis Goldfussi, Nt/st. ■wood. 



Area hiantula, Desk. Dentalium Kickxi, Nyst. 



Modiola sericea, Br. Vermetus, sp. 



Diplodonta fragilis, A. Braun. Tornatella Nysti, Buch.f 



Lucina tenuistria, Heb. Trochus Rhenanus, Mer. 



Bronni, Mer, Xenophora Lyellana, Bosq. 



Cardium tenuisulcatum, Nysi. Natica glaucinoides, Sow. 



scobinula, Mer. Cerithium margaritaceum, Lam. 



Cyprina rotundata, A. Braun. Tritonium Flandricum, De Kon. 



Isocardia transversa, Nyst. Murex Deshayesii, Duch. 



Cytherea splendida, Mer. Voluta Rathieri, Heb. 



Cardita orbicularis, Br. Chenopus acutidactylus, n.sp., identical 



Corbula pisum, Sow. with one of the forms from Alzey. 



Thracia phaseolina, Kien. Cypraea, sp. 



Telhna Hebertiana, Bosq. 



The following are very common, Pectunculus , Natica glauci" 

 noideSy Lucina tenuistria, Dentaliu?n Kickxi, Xenophora Lyellana^ 

 and Ostrcea callifera ; whereas Natica crassatina, Perna, and Shark's 

 teeth are altogether wanting. M. Weinkauif is still collecting in 

 other portions of the district hitherto neglected, and I therefore look 

 forward to another early opportunity of completing the fauna of the 

 marine sands of each separate locality. 



It is most satisfactory to know, from information recently received 

 from him, that M. Deshayes is about to publish a Supplement to 

 his valuable work " On the Shells of the Paris Basin," in which he 

 will make known the new discoveries in the Sables Superieurs near 

 Jeurre, Etampes, &c., the fauna of which is almost identical with 

 that of Alzey ; we shall then be the more convinced that this formation 

 is spread over vast districts. Its extension from Kreutznach to the 

 Solothurn Jura (Delsberg), although with considerable gaps, imparts 

 to it a more than common interest. 



According to communications received from Prof. Emmrich, I have 

 no longer any reason to doubt that the so-called shell-molasse of the 

 Chiemsee, in the neighbourhood of Traunstein and other localities 

 in the highlands of Bavaria, also belongs to this formation ; and 

 Emmrich has lately distinctly stated J that this formation occurs 

 above the nummulitic beds, and under the Cyrena-marls with 

 pitch-coal of Miesbach, which are absolutely identical with our 

 Rhenish Cyrena-marls. There is no longer any question of a com- 

 parison with the true Upper Miocene molasse of Switzerland (St. 

 Gall). And thus we also find along the edge of the Alps inter- 

 mediate formations between Eocene and Upper IVIioceue, as every- 

 where else in the true typical development of the whole formation. 



In the sandstones of the Chiemsee, of the Lochergraben near 



* Numerous specimens, of all ages, of this species were lately found at Alzey 

 by M. Grein, and will shortly be described by me. Its nearest analogue is Teredo 

 Toumali, Leym., from the nummulitic beds. 



t By comparison of the Mayence species with the true T. simulata, Brand., 

 ■which I have received from Mr. Hamilton, I have convinced myself that they are 

 different species. The Magdeburg species is, again, different from that of Mayence 

 or London. The same may be said respecting the supposed identity of Tritonium 

 argutum and T. Flandricum, as Beyrich has already suggested. 



X Zeitschr. Deutsch. Geol. Gesells. vol. vi. p. 668. 



