| OCR Text |
Show 1890.] TEKTH IN A TAILLESS BATRACHIAN. 665 tailless Batrachians most forms are provided with teeth on the vomers, whilst but a few have any upon either the palatines or the parasphenoid. Among Reptiles, a distribution of the teeth on as many as three elements (pterygoids, palatines, vomers) is only known in two forms-a Rhyncnocephalian and Lacertilian. It is a fact that the Batrachians generally agree with the Fishes in the sequence in which the teeth of the palate are usually lost, viz., in the following order:-(1) Pterygoid, (2) Parasphenoid, (3) Palatine, (4) Vomer; whilst in the Reptilia we find great Teeth on Vomers, Palatines, Pterygoids, Parasphenoid. Vomers, Palatines, Pterygoids. Vomers, Palatines, Parasphenoid. Vomers, Pterygoids, Parasphenoid. Vomers, Palatines. Vomers, Pterygoids. Vomers, Parasphenoid. Palatines, Pterygoids. Palatines, Parasphenoid. STEGOCEPHALA. Dawsonia. Seeleya. Acanthostoma. Sparodus. Hijlerpeton. Mastodonsaurus. Capitosaurus. Labyrinthoclon. Branch iosaurus. Nyrania. BATRACIIIA. Caudata (Plctho-clontince, Desmognathince). Pelobates. * Caudata gener-ally. Apoda. Ceratohyla. Hemiphractus. Triprion. Amphodus. Ecaudata gener-ally. Callula. * Genyophryne. Dyscophiclce. REPTILIA. Champsosaurus. Ophisaurus. * Sphenodon. * Hyper odapedon. Palceohatteria. Proterosaurus. Procolophon.. Placodontia. Chamceleolis. Heloderma. # Ophidia gener-ally. Oligodon. * Basypeltis. Atractaspis. Lacertilia gener-ally. Mosasauria. |
