GILMORE: the fossil turtles of the UINTA FORMATION 



153 



surface of the lip on either side of the low median ridge there are shallow longitudinal 

 depressions, which run forward to the slight emarginations at either side of the 

 center. At the gular-humeral sulcus the lateral border of the lobe is slightly 

 emarginate. The upper surface, 57 mm. back from the front of the lip, is almost 

 perpendicularly excavated, thus reducing the plastron from 21 mm. to 10 mm. in 

 thickness. The posterior lobe is 90 mm. long; and is 163 mm. wide at the base. 

 The posterior notch is 50 mm. wide and 23 mm. deep. At the inguinal notch the 



Fig. 22. Testudo uinknsis. Plastron of type, C. M. No. 233L One-fourth natural size. 



edge of the lobe forms a wall 22 mm. high. This wall diminishes in height poste- 

 riorly, so that at the anal-femoral sulcus it measures 15 mm. in height. The outer 

 face of this wall slopes off rather gradually to the subacute lateral edge, while the 

 inner edge slopes abruptly to the inner level of the floor of the carapace. The ento- 

 plastron is rhombic in form, 68 mm. long on the midline, and 69 mm. wide. The 

 hyoplastra meet along the midline for a distance of 74 mm.; the hypoplastra for 

 69 mm. ; and the xiphiplastra for 55 mm. 



The bridge is 135 mm. wide. The plastron is quite concave and at least 

 suggests that this individual was a male. 



The gular scutes overlap the entoplastron and on the midline have a length 

 of 57 mm. The humerals at the middle are 53 mm. long; the pectorals 46 mm.; 

 abdominals 80 mm.; femorals 42 mm.; and anals 28 mm. 



