354 STRATIGKAPHICAL GEOLOGY 



Fossils of the Bunter 



Plants. Schizoiieura paradoxa, Voltzia heterophylla, Albertia 



elliptica, JEthophyllum speciosum. 



Mollusca. (In Germany only) Myophoria costata, Gervillia Murclii- 



soni, Pleuromya mactroides, Beneckeia tenuis. 



Amphibia. Bones of Trematosaurus and Labyrinthodont footprints. 



Fossils of the Muschclkalk 



Echinoderma. Encrinus liliiformis. 



Brachiopoda. Terebratula (Co3iiothyris) vulgaris, Plicigera trigonella, 



Rhynchonella decurtata. 

 Lamellibranchia. Myophoria vulgaris, Gervillia (Hosrnesia) socialis, 



Pecten discites, Lima striata, Trigonodus Sandbergeri. 

 Gastropoda. Coelostylina gregaria, Undularia scalata, Dentaliinn 



torquatium. 

 Cephalopoda. Temnocheilus bidorsatum, Ceratites nodosus, Beneckeia 



Bucbi. 



Pisces. Ceratodus Kaupi, Hybodus major, Acrodus Gaillardoti. 



Reptilia. Placodus gigas, Nothosaurus mirabilis. 



Fossils of the Keuper 



Plants. Equisetites arenaceus, Pterophyllum Jsegeri, Voltzia 



heterophylla, Schizoneura paradoxa, Danseopsis mar- 

 antacea, Yuccites vogesiacus. 



Crustacea. Estheria minuta. 



Mollusca. Myophoria Goldfussi, Anoplophora donacina (German). 



Pisces. Acrodus minimus, Dipteronotus cyphus, Hybodus 



Keuperi, Palseoniscus superstes, Semionotus Bergeri. 



Amphibia. Mastodonsatirus giganteus. 



Reptilia. Hyperodapedon Gordoni, Telerpeton elginense. 



Mammalia. Tritylodon Fraasi (German). 



C. THE TRIAS IN BRITAIN 



The general extent of the Triassic deposits in England can be 

 seen from any good geological map, and I assume that the student 

 possesses the smaller Index Map of the Geological Survey. 



With respect to the relations between the Trias and the 

 Permian, recent observations have tended to show that the break 

 between them is not of such magnitude as was formerly supposed. 

 The outcrop of the Bunter follows the strike of the underlying 

 Permian more or less conformably, especially in Devonshire, and, 

 again, in the north-east of England ; but there is unquestionably a 

 break between them, accompanied by overstep which is uncon- 

 formity. Some physical changes took place at the close of the 

 Permian period, but the actual lapse of time between the cessation 

 of Permian conditions and the formation of the Bunter Basement 

 Beds may not have been great. 



In order to avoid the repetition of detail, and to impart a 



