Reviews—Prof. A. Gaudry’s Permian Reptilia, etc. 167 
Permian land fauna in distant regions co-existed with an Upper 
Triassic marine fauna. In such an eventuality we should, of course, 
have to take the marine clock as the standard time-keeper. 
The second memoir quoted at the head of this notice is mainly 
a reprint of separate articles published by the author in the Bull. 
Soc. Géol. France, and in the second part of his ‘*‘ Enchainements 
du Monde Animal” (1883) ; and is illustrated both by woodcuts and 
plates. It forms the first part of a new serial commenced by the 
Natural History Society of Autun, which is to be congratulated on 
such an excellent beginning. A reduced plate is given of the 
skeleton of Actinodon already noticed, together with one of a 
beautifully preserved portion of the vertebral column of Archegosaurus ; 
while other plates are devoted to Haptodus, Euchirosaurus, Protriton, 
Pleuroneura, etc. Among the Labyrinthodont forms illustrated by 
Fra. 3. Slab showing the skeleton of Fic. 4. Anterior aspect of the im- 
a young individual of Protriton petrolet. pertect lefthumerus of Stereorhachis 
Nat. size. dominans. Nat. size. 
the woodcuts, we may especially call attention to the remarkable 
lateral expansion of the summits of the neural spines of the vertebree 
of Euchirosaurus, of which, by the courtesy of Prof. Gaudry, we are 
enabled to reproduce the illustration in Fig. 2. The probable 
identity of the French Protriton (Fig. 3) with the Bohemian Branchio- 
saurus has been already noticed in a review published by the present 
writer in the previous volume of this Journal. The true Reptiles 
found in the Autun deposits comprise Haptodus and Stereorhachis. 
The former is known by a considerable portion of the skeleton, 
although unfortunately in a much dislocated and unsatisfactory 
condition. Prof. Gaudry suggests that this form may be allied to 
