RESTORATION OF SEYMOURIA BAYLORENSIS BROILI 235 



is practically certain because of the like numbers determined by 

 me in Limnoscelis; that the toes were slender is evident from several 

 isolated, unplaceable distal phalanges in the matrix. That the 

 tail could hardly have been longer than is represented, perhaps 

 not as long, is indicated by the taper of the six proximal vertebrae 

 preserved in position, folded down, like a dog's tail, to the extremity 

 of the ischia. Two distal tarsals cannot be seen as covered by 

 the metatarsals; and the carpals cannot be clearly made out. 



As a whole Seymouria stands lowest in rank among known 

 reptiles, approaching in many ways the contemporary amphibi- 

 ans. This is indicated by the structure of the posterior cranial 

 region, by the extraordinary amphibian ear-notch, by the primitive 

 structure of the vertebral centra, as shown in Desmospondylus, 

 by the long, free, caudal ribs, by the possession of a single sacral 

 vertebra, and by the very amphibian-like limb bones and girdles. 

 Indeed, so far as the characters are shown in the figure, there is 

 not a single thing to differentiate the form from an amphibian, 

 unless it be the apparent absence of the cleithrum. Unfortunately 

 the mutilation of the bone in the cranial table prevents the cor- 

 roboration of the temporal sutures as determined by Broili; but 

 I doubt not that Broili's determinations are correct, showing all 

 the bones found in the temnospondylous amphibians and in similar 

 arrangement, some of which have never been detected in other 

 reptiles. The palate, also, as I make it out, is different from that 

 of other known reptiles, though distinctly reptilian in structure. 

 The pectoral and pelvic girdles are absolutely indistinguishable 

 from those of the contemporary amphibians, save by the more 

 posteriorly directed ilia and the absence of the cleithra, and both 

 of these characters may and probably will yet be found in the 

 temnospondyls. 



The suture between the scapula and coracoid is very distinct, 

 quite in the position I have found it in other Texas reptiles and 

 amphibians ; and the coracoid is composed evidently of but a single 

 element, the posterior element, the so-called coracoid, remaining 

 cartilaginous through life, as was also the case in Varanosaurus. 

 It is because of these facts, observed in several forms, that I am 

 quite convinced the coracoid as preserved corresponds identically 



