THE PERMIAN PERIOD. 201 
Bristol will be considered as Triassic, thus leaving Proforo- 
saurus * as the principal and most important representative of 
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Wize 
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Fig. 138.—Protorosaurus Spener?, Middle Permian, Thuringia, reduced in size. 
(After Von Meyer.) [Copied from Dana. ] 
the Permian Reptiles.t The type-species of the genus Pro- 
torosaurus is the P. Speneri (fig. 138) of the “ Kupfer-schiefer” of 
* Though commonly spelt as above, it is probable that the name of this 
Lizard was really intended to have been Proterosaurus—from the Greek 
proteros, first ; and sauwra, lizard: and this spelling is followed by many 
writers. 
+ In an extremely able paper upon the subject (Quart. Journ. Geol. 
Soc., vol. xxvi.), Mr Etheridge has shown that there are good physical 
grounds for regarding the dolomitic conglomerate of Bristol as of Triassic 
age, and as probably corresponding in time with the Muschelkalk of the 
Continent, 
