GEINITZ ON THE SAXON CRETACEOUS ROCKS. 19 



5. The Upper Quader occurs, as has been said, on the right bank 

 of the Elbe, in the Saxon Switzerland, but it is extremely poor in 

 organic remains. Of those that are found, the Pecten lens. Lam., 

 seems the only one peculiar to it, the rest being found also in the 

 Planer-kalk and lower Quader. Like this latter rock, it is a sand- 

 stone of tolerably good quality in some districts, but occasionally of 

 very loose texture and little consolidated. 



A comparison of the fossils shows, that of 370 species determined, 

 there were 20 species of fishes, 2 of insects, 5 of Crustacea, 8 of An- 

 nelides, 37 Cephalopoda, 58 other univalves, 180 bivalves, 15 Ra- 

 diaria, 14 Polyparia, 18 Amorphozoa and 17 plants. Of these there 

 are — 



Species. 



In the Lower Quader 148 (56 sp. fromTyssa alone.) 



„ Lower Planer 120 



„ Middle Planer 128 (51 „ from Luschitz.) 



„ Upper Planer 168 (148 „ from Strehlen.) 



„ Upper Quader about 30 



Common to Lower Quader and Lower Planer ... 54 

 „ and Middle Planer... 40 



„ and Upper Planer ... 35 



„ and Upper Quader... 25 



Lower Planer and Middle Planer about 50 



„ and Upper Planer 29 



„ and Upper Quader 15 



Middle Planer and Upper Planer ... 52 



„ and Upper Quader ... 6 



Upper Planer and Upper Quader about 1 7 



The results of the investigations and comparisons at present made 

 on this subject, as recorded in my ' Characteristik der Schichten 

 und Petrifacten des sachsisch-bohmischen Kreidegebirges,' are 

 these : — 



That the Lower Quader represents the Lower Greensand, the 

 Upper Planer the lower division of the Upper Greensand, the Middle 

 Planer the upper division of the Upper Greensand, the Upper Planer 

 the Chalk, and the Upper Quader the Upper Chalk. 



Such then are the relations of these cretaceous rocks of Saxony 

 and Bohemia, interesting and important by their extent and thick- 

 ness, as well as by the multitude of their imbedded fossils, with the 

 greatly developed and carefully worked formations of the same pe- 

 riod in England. They offer an additional proof, in the complete 

 agreement of so many species of fossils with those from distant spots 

 in Germany, Poland, France, England and Sweden, how uniformly 

 and completely what is now an entire continent must have existed, 

 at the date of these deposits, as the bed of an ocean. 



D. T. A. 



c2 



