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( 227 ) 3. Investigations in South African Fossil Reptiles and Amphibia (Part 13).— By S. H. HaughtoxN, B.A., D.Sc, F.G.S., Hon. Curator, Palaeontological Collections. 13. Descriptive Catalogue of the Amphibia of the Karroo System. (With 19 Text-figures.) Order LABYRINTHODONTIA. Grade RACHITOMI. " Labyrinthodonts with ossified basioccipital and basisphenoid Occipital condyle triple or double. Pterygoids usually with a medium- sized palatal part, interpterygoid vacuities of medium to large size. Pterygoids articulating with both parasphenoid and basisphenoid. " Tabulars and dermosupra -occipitals with occipital flanges. Paroccipital always visible from behind. " Vertebrae rachitomous, i.e. with small paired pleurocentra and half -moon-shaped intercentra." (Watson.) Fam. Rhinesuchidae, Watson. 1919. Watson, Phil. Trans., B. 209, p. 65. " Rachitomi with somewhat depressed skulls, orbits small and far back, pterygoids not reaching the prevomers, interpterygoid vacuities of large size, no definite basipterygoid processes. Occipital condyle double. Clavicles expanded. Pubis ossified." (Watson.) Gen. RHINESUCHUS, Broom. 1908. Broom, Ann. S. Afr. Mus., vol. iv, pt. 7, p. 373. 1911. Myriodon, van Hoepen, Ann. Transv. Mus., vol. iii, pt. 2, p. 103. 1915. Haughton, Ann. S. Afr. Mus., vol. xii, pt. 3, p. 6(5. 1916. Uranocentrodon, van Hoepen, Ann. Transv. Mus., vol. v, pt. 4, p. 217. 1919. Watson, Phil. Trans., B. 209, p. 10. " Medium-sized to large temnospondylous labyrinthodonts.

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Investigations in South African Fossil Reptiles and Amphibia. Part 13. Descriptive Catalogue of the Amphibia of the Karroo System

Annals of The South African Museum 22: 227-261 (1925)

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