— 153 - 
as in Brachyops (loc. cit. fig. 1, 2, 2) and PetvopJiryne 
(flg. 4, 22), it may then be deemed desirable to further 
investigate the locality of its imbedding. 
M. Pierre Mikhailovitch YasiJcov, in his suppleraentary 
Letter to Fischer de Waldheim's Memoir, writes: — «Le 
16, Cräne du Bhinosaurus Jasikovii, Fisch, quoique 
decouvert dans le gouvernement de Simbirsk, est sans 
indication precise de localite.» (loc. cit. p. 14). 
The skull of Petrophryne granulata was discovered 
in a lacustrine sand-stone formation, not later than 'tri- 
assic, possibly of 'permian age, at the 'Tafelberg, Cape 
of Good Hope. The sandstone series of Mängaü, Central 
India, are of Permian age. I am not cognizant of any 
Labyrinthodont in Jurassic strata, unless Rhinosaurus be 
proved to be bicondyloid, and also to have been deri- 
ved from the same Jurassic series as the Ichtyosaurian 
fossils described by His Excellency Fischer de Waldheim. 
