336 A SAUR0P0D0US DINOSAUR PROM MADAGASCAR. [Aug. 1895, 



probably Pelorosaurus may be provisionally included). Unfortu- 

 nately, as already said, I cannot be sure as to Cetiosaurus, although 

 I am inclined to think that the vertebras had pits of a different 

 type from those occurring in Boiliriospondylus. If this be so, the 

 latter genus cannot be included in the Cetiosauridae ; and as it 

 certainly indicates a family-type distinct from the Atlantosauridse, 

 the name Bothriospondylidae may be provisionally suggested. 



There is, unfortunately, a considerable degree of doubt as to 

 whether the generic name Boihriospondylus is entitled to stand, 

 since, as I have shown elsewhere, 1 it is highly probable that B. 

 robustus, which cannot be generically separated from the type- 

 species, is really identical with Cardiodon, described at a much 

 earlier date upon the evidence of a tooth. If this supposition is 

 eventually verified, the name Boihriospondylus will have to yield to 

 Cardiodon, and Bothriospondylidas to Cardiodon tidae. 



The identification of the Malagasy dinosaur with a type occurring 

 in the Upper and Lower Jurassic of England, but unknown in the 

 Cretaceous, harmonizes with the reference of some of the fossiliferous 

 strata of Madagascar to the former period. 



Discussion. 



The President remarked upon the great interest attaching to the 

 discovery of an Ornithopsis-like dinosaur in Madagascar, in rocks of 

 supposed Jurassic age, and referred to the recent paper by the 

 Rev. Richard Baron, in which he described Jurassic beds as 

 occurring in the North-west of Madagascar, where these remains 

 were reported to have been obtained. 



Prof. Hull, Prof. Seeley, and Mr. E. T. Newton also spoke, and 

 the Author replied. 



1 Cat. Foss. Eept. Brit. Mus. pt. iv. (1890) p. 236. 



