7(5 



THE EXTINCT BATRACHIA, REPTILIA 



It is in the third a short acute transverse crest truncate in front, gradually inclined behind ; fourth, a similar crest 

 curved into a crescent quite as in Leidy's plate* above cited under T. obscurus. In the fifth they are two weak 

 elevations, much less marked than in the above in my possession. All the above exhibit a well marked constriction 

 between the parapophyses and the rim of the cup. The dorsals with hypapophyses are distinguished by the less 

 cordate form of the articular cups, they being relatively broader below, and in the second to fifth, narrower above 

 than in the 'I'. cordatus. Their neural arches have on the inner faces a, ridge constricting the neural canal slightly. 

 The hypapophysis of tin; two-fifths in my possession arc; rather short, broad and obtuse. 



The eei'vicals may also be known by their strong posterior shoulder, and constriction of the body behind the para 

 pophyses, where the width enters the length (exclusive of ball) twice : the relation is 1:1.5 in T. nedcaesariensis. 

 The parapophyses are most abruptly turned out, and are directed downwards, thus embracing a median conoavity 

 which is divided by a, rather narrow carina. Separated from the rim of flu; cup by a narrow transverse plane, a hypa- 



pophysial elevation extends transversely between positions in front, of flu: parapophyses: I his is less elevated medially 

 than exteriorly, the latter position being marked by a, prominent angle. 



The articular cup of the first, dormtl is a, slightly transverse oval. The lumbar vertebras exhibit little to distinguish 

 them from those of other species. An anterior caudal is more depressed than thai, from near the same position 

 in T. brevispinis. The cup is broader than high, and the inferior plane broad and concave. 



Measurementi. 

 Fifth cervical ; total length, 



length to shoulder, 

 width of neural canal, 



'• between ends diapophyses, 



" " " parapophyses, 



lateral depth of body in front, 



median " " " 



depth art ieul.il- cup, 

 .i a it 



Seventh dorsal; total length, 



length to shoulder, 

 width neural canal, 



depth anteriorly, with hypapophysis, 

 width of cup, 

 depth " 

 Posterior dorsal ; length to shoulder, 



vertical diameter cup, 



transverse " " 



The mandible preserved, indicates an animal of considerable size. Estimated according to the proportions of 

 existing (lavia.ls its length would have been : — 



In. 

 Head, 28.70 



Body, 02.85 



Tail, 69.64 



In. 



Lin. 



2 



<). 



2 



1.5 





!). 



2 



8.5 



1 



9.5 



1 



9. 



1 



8. 



1 



4. 



1 



-(.75 



2 



7. 



I 



10.5 





0.85 



1 



11.5 



1 



(1.75 



1 



0-35 





24.35 





20.75 





10. 



Total, 



Length of mandible preserved, 

 " symphysis, 

 " splenial in front of fork, 



Ft., 15; In., 11.19 



In. Lin. 

 18. 



11.5 

 4.0 



* II, fig. «- 



