18 GEOLOGICAL MEMOIRS. 



Elbe the upper Quader is chiefly developed, and beyond Schandau 

 the two members of the formation are both found. The following 

 are the most common and characteristic fossils of the lower Quader : — 



Serpula septemsulcata, Reich. Inoceramus concentricus, Sow. 



Ammonites Rhotomagensis, Defr. striatus. 



Cardium Neptuni, Goldf. Pecten aequicostatus ? Lam. 



dubium, Gein. arcuatus, Soiv. 



Hillanum, Sow. Fungia coronula, Gold. 



Scypliia subreticulata, Muns. 



2. The Lower Planer varies in appearance more than the other 

 members of the formation, being affected by the underlying rocks ; 

 and it is thus sometimes a good deal like the marly sandstone of the 

 lower Quader, from which it is chiefly distinguished by its finer 

 texture and greater compactness. It is best characterized by a Hip- 

 purite schist associated with it, and besides the Hippurites the fol- 

 lowing fossils are very abundant : — 



Spondylus striatus, Sow. Terebratula gallina, Brong. 

 Pecten crispus, Rom. triangularis, Nilss. 



notabilis, Mun. ovoides. Sow. 



Lima aspera, Mant. Cidaris claviger, Mant. 

 Exogyra haliotoidea, Sow. 



3. The Middle Planer. — This bed sometimes appears as Planer- 

 sandstone, and sometimes as Planer-marl, according to the propor- 

 tion of carbonate of lime which it contains, a proportion which occa- 

 sionally amounts to as much as 45 per cent. Its lithological cha- 

 racter likewise changes in the same way, exhibiting a variable adr 

 mixture of limestone, sand and clay, and occasionally lignite and 

 iron ochre. It is distinguished from the lower Quader by the fine- 

 ness of its grain as a sandstone, and its frequent yellowish and 

 bluish spots. It is generally poor in fossils, but in some places, as 

 near Luschitz in Bohemia, contains a considerable number. The 

 following is a list of those which are characteristic : — 



Belemnites minimus, List Exogyra plicatula, Lam. 



Peetunculus lens, Nilss. Ostrea lateralis, Nilss. 

 Inoceramus striatus, Gold. vesicularis, Brong, 



concentricus. Sow. 



4. The Pldner-kalk is a marly limestone of a clear gray colour, 

 containing about 75 per cent, of carbonate of lime. It is chiefly 

 limited in Saxony to two places — Weinbohla and Strehlen, but is 

 more widely extended in Bohemia, where it is much used for burning. 

 It abounds with the remains of fishes, of species found in the chalk, 

 and with Cephalopoda of the chalk-marl, and besides these con- 

 tains — 



Inoceramus Brongniarti, Park. Terebratula pisum, Soio, 



annulatus. Gold. mantelliana, Soio. 



Cuvieri, Sow. octoplicata, Sow. 



Spondylus spinosus. Gold. ornata, Rom. 



duplicatus. Gold. Spatangus cor-anguinum. Lam. 



Terebratula semi-globosa, Sow. Cidarites granulosus, Gold. 



carnea, Sow. 



