28 



THE HISTORY OF THE PELYCOSAURIA, WITH 



Gaudry did not make any remarks about the relationships of Stereorachis. Zit- 

 tel 34 in 1888 placed it among the Stegocephali : " Unterordnung Stereospondyli. 

 Vollwirbler, 1. Familie Gastrolepidoti, Bauchschupper." Lydekker 24 ' 35 was the first who 

 gave the right position to Stereorachis, among the Theriodontia in the family Glepsy- 

 dropsidw Cope. Zittel 36 followed him in his Grundziigen der Paleontologie, 1895. 



Callibrachion gaudryi, Boule and Glengeaud. 70 



Callibrachion is the name; applied to a very nearly perfect specimen from the Per- 

 mian of Autun. It has many of the features of the Permian Reptiles and was compared 

 by the authors with the Palceohatteria of Credner. That it belongs among the Pelycosau- 

 ria there is little doubt, though the presence of procoelus and opisthoccelus vertebrae is 

 an unwonted character in the group, and if their presence is established in Hie specimen 

 may lead to a revision of its position. The authors say of the specimen, p. 15 : " Le 

 Callibrachion a beaucoup plus d'affinites avec le Reptile du Rothliegende de la Saxe que 

 M. Credner a appele Palaiffhatteria. D'aprcs ce qui est conserve de la tete de notre 

 specimen, nous pouvons croire que les cranes des deux animaux etaient fort ressemb- 

 lants. La division de la machoire inferieure en plusicurs elements, la forme des 

 dents, leur ordre de distribution suivant le grandeur a la machoire superieurc, sont des 

 traits communs. Dans les deux fossiles les centrums etaient separes des arcs neuraux, 

 depourvous d'apophyses transverses, et la notochorde persistait an centre des corps vcrte 

 braux. Les pattes etaient egalement bien developpees et disposers sur le memo plan. 



" Mais a la cote de ces ressemblances, nous pouvons notre quelques differences. Les 

 vertebres du Callibrachion presentent une procelie bien marquee et les premieres ver- 

 tebres sont opisthoceles." 



Pelycosaueia from the Permian of Africa. 



Owen 37 described in 1859 Galesaurus planiceps and Cynochampsa laniaria from the 

 Beaufort Beds of the Karoo System and placed them in the family Crocodilia,. In the 

 final paper these Reptilian remains are figured but not referred to the Crocodilia. In 

 the second edition of his Paleontology (1861) Owen 38 placed these two genera in a new, 

 third family of the order Anomodontia, with the name Gynodontia. This is his classifi- 

 cation : 



Order Anomodontia. 



1. Family Dicynodontia—Dicynodon Ow., PtychognaiJmt Ow, 



2. Family Cryptodontia— udenodon Ow., Bhynchosaurux Ow . 

 8. Family Gynodontia — Galesaurus Ow., Cynochampsa Ow. 



The family Gynodontia is thus characterized : " A pair of teeth in each jaw, resem- 

 bling in shape, position and relative size to the other teeth, the canines of carnivorous 

 mammals, and dividing the incisors from the molars." 



