F. von Huene — Order Thecodontia. 25 



Sauranodontida?, and in the uppermost Cretaceous the 

 Champ sosaurida?, branched off from the main line. 



As an Upper Permian Thecodont Broom has described 4 

 the genus Youngina. But this form seems to the writer 

 very nearly related to Broomia Watson. 27 Watson has 

 pointed out that Broomia is nearly related to Heleosaurus 

 and Heleophilus. They are also allied with Adelosaurus, 

 Aphelosaurus and even with the much more specialized 

 Protorosaurus, further with "Eosuchus" (Watson = 

 Noteosuclius Broom). All of these genera should appar- 

 ently be united in a single inclusive group, the Protoro- 

 sauria. Watson has pointed out 27 that Broomia possibly 

 might be related to the Lower Permian Captorhinidae, 

 and through these to the more typical Cotylosaurians. 

 If this chain of connections be true, the Protorosauria 

 would form an intermediate link between a group of the 

 primitive Cotylosaurians and the Thecodonts, or, in gen- 

 eral, the Archosauria. 



Tubingen, 7. January 1922. 



Literature. 



1 Broom, E. : On a new reptile (Proterosuclius fergusi) from the Karroo 

 beds of Tarkastad. Ann. S. Afr. Mus., 4, 1904, 159-163, pi. 19. 



2 Broom, E. : The South African diaptosaurian reptile Howesia. Proe. 

 Zool. Soc. London, 1906, 591-600, pis. 40-41. 



3 Broom, E. : On the South African Pseudosuchian Euparkeria and allied 

 genera. Ibid., 1913, 619-633, pis. 75-79. 



4 Broom, E. : A new Thecodont reptile. Ibid., 1914, 1072-1077, 3 figs. 



5 Case, E. C. : Preliminary description of a new suborder of Phytosaurian 

 reptiles, with a description of a new species of Phytosaurus. Journ. of Geol., 

 28, 1920, 524-535. 



6 Emerson, B. K. and Loomis, F. B. ; Stegomus longipes, a new reptile 

 from the Triassic sandstones of the Connecticut Valley. This Journal (4), 

 17, 1904, 377-380, pi. 22. 



T Haughton, S. H. : A new Thecodont from the Stormberg beds. Ann. 

 S. Afr. Mus., 12, 1915, 98-105, 3 figs. 



s Haughton, S. H. : On the reptilian genera Euparkeria Broom and Meso- 

 suchus Watson. Trans. E. Soc, S. Afr., 10, 2, 1921, 81-88, pis. 2-3. 



9 Hoepen, E. C. 1ST. van: A new Pseudosuchian from the Stormberg beds. 

 Ann. S. Afr. Mus., 5, 1915, 83-87, pis. 13-14. 



10 Huene, F. v. : Ueber einen echten Bhynchocephalen aus der Trias von 

 Elgin, Brachyrhinodon taylori. N. Jahrb.'f. Min., etc., 1910, 2, 29-62. 



11 Huene, F. v.: Ueber Erythrosuchus, Vertreter der neuen Beptil-Ordnung 

 Pelycosimia. Geol. u. Pal. Abh., 10, 1, 1911. 1-60. Tf. 1-11. 



12 Huene, F. v. : Beitrage zur Kenntnis u. Beurteilung der Parasuchier. 

 Ibid., 10, 1, 1911, 61-122, Tf. 12-17. 



13 Huene, F. v. : Beitrage zur Geschichte der Archosaurier. Ibid., 13, 1, 

 1914, 1-53, Tf. 1-7. 



