3^08 TKSTUDO. 



quarter inches long, and have their posterior border a little behind the axillary 



notchet^. 



The humeral scutes are about seven and a half lines long where they come in 

 contact, but outwardly expand to two and a half inches. They join the axillary 

 scute, the posterior angle of the fourth, the whole of the fifth, and the lower half 

 inch of the anterior margin of the sixth marginal scutes. 



The abdominal scutes are three inches in length, and join the sixth and seventh 

 marginal, and the inguinal scutes. 



The length of the femoral scutes is two and a quarter inches, and that of the 

 caudal scutes where they are conjoined, is one inch five lines. 



The axillary scute is placed upon the anterior angle of the hyosternal and the 

 postero-inferior margin of the third marginal plates, between the fourth marginal 

 and the humeral scutes. 



The inguinal scute rests upon the hyposternal and seventh marginal plates, be- 

 tween the abdominal and seventh and eighth marginal scutes. 



MEASUREMENTS. 



Inches. Lines. 



Length of sternum in the median line . . . . • . • .10 



Breadth of sternum at the suture of the hyo- and hyposternal plates . . 7 



Estimated length of an tero- posterior curve of the carapace . . . .13 6 



Length of transverse curve from the level of the sternum . . . .15 6 



Height 5 6 



Length of the sixth marginal plate . . • • • 2 6 



Height of the upper edge of the lateral marginal plates from the level of the 



sternum 3 



This species is respectfully dedicated to Dr. David Dale Owen, of New Harmony, 

 Indiana, whose many contributions to Palaeontology and Geology have rendered 

 him distinguished in science. 



Testudo Culbertsonii, Leidt. 



(Plates XXII., XXIV. Fig. 2.) 



Emys Ciilbertsonii, Leidy : Proc. Acad. Nat. Sci., 1852, vi., 34. 



Testudo Culberisonii, Leidy : Proc. Acad. Nat. Sci., 1852, vi., 59 ; Owen's Rep. of a Geol. Surv. of Wise, etc. 

 569. 



This species is established upon a nearly entire carapace and plastron in the col- 

 lection of Dr. Owen. The specimen upon one side is a little crushed out of its 

 original form ; and it is much larger than that upon which is founded the Testudo 

 Oweni, and is relatively less convex and high in comparison with its length and 

 breadth, and also is less abruptly retuse posteriorly. 



The sternum in the specimen is concave, indicating a male individual, and ante- 

 riorly it does not turn upward. 



The costal plates, though in conjunction with the marginal plates, had not yet 

 united by suture. 



The lateral marginal plates are vertically convex, and three and a half inches 



