PROTEITONIDiE. 211 



Branchiosaurus gracilis, Credner \ 

 Branchiosaurus amblgstomus, Credner 2 . 



The type species. Length of adult about 0,202 (8 inches). 



Fig. 50. 



Protriton petrolei. — Skeleton of larva ; from the Eothliegendes (Lower Permian) 

 of Autun. \. {After Gaudry.) 



The specific identity of the larval B. gracilis with the adult B. 

 amblystomus, of the Rothliegendes of Saxony, is admitted by their 

 describer 3 ; while the impossibility of separating the former from the 

 larval P. petrolei of the corresponding beds of Prance was pointed 

 out by Geinitz and Deichmuller 4 . 



Hob. Europe (France, Saxony, and Thuringia). 



R. 489. Fragment of shale showing the skeleton of a larva ; from 

 the Eothliegendes (Lower Permian) of Millery, near Autun 

 (Saone-et-Loire), France. This specimen agrees in all 

 respects with the one represented in fig. 50. 



Presented by Sir B. Owen, K.C.B., 1884. 



R. 1300. Slab of shale with several larval skeletons ; from Millery. 



Purchased, 1888. 



Protriton salamandroides (Fritsch 5 ). 

 Syn. Branchiosaurus salamandroides (Fritsch 6 ). 



The type of Branchiosaurus. Distinguished from the preceding 

 species by the stouter vertebrae of the larva, in which the proportion 

 of the width to the length is 1 to 8 instead of 1 to 13. The trans- 

 verse processes of the vertebrae are also stouter and wider. 



Hob. Europe (Bohemia). 



1 Zeitschr. deutsch. geol. Ges. vol. xxxiii. p. 306 (1881). 2 Ibid. p. 575. 



3 Ibid. vol. xxxviii. pp. 577, 578 (1886). 



4 Vide ibid. vol. xxxvi. pp. 685-686 (1884). 



5 Sitz. k. bohm. Ges. Wiss. for 1875, p. 72 (1876).— Branchiosaurus. 



6 Loc. cit. 



p2 



