F. jB. Loomis — Turtles from the Upper Harrison Beds. 23 





Neurals 





Vertebrate 





Length 



Width 





Length 



Width 



1 



63 



40 



1 



115 



125 



2 



40 



46 



2 



85 



98 



3 



38 



42 



3 



90 



100 



4 



36 



52 



4 



68 



80 



5 



34 



48 



5 



104 



155 



6 



29 



45 









7 



28 



45 









8 



38 



36 









Fig. 6. 



Fig. 6a. The carapace of T. brevisterna, projected on a flat surface. 

 The posterior part is a little spread. 34 nat. size. 

 Fig. 66. Plastron of same. 



This individual seems to be very old and the sulci marking 

 the outline of the scutes are but dimly marked. There is a 

 low boss on the first neural. Both neural 1 and 3 are tetra- 

 gonal, 3 is octagonal and the others are hexagonal. The upper 

 suprapygal is as usual in the genus. Costals 2, 4, 6, and 8 are 

 narrow above, but spread distally, having a wide base below. 

 Costals 1, 3, 5, and 7, on the other hand, are wide above and 

 narrow below. 



