TESTTJDINID^S. Ill 



plastron of Emys hordwelliensis can be specifically distinguished 

 from that of E. crassa, both specimens having the humero-pectoral 

 sulcus confined to the hyoplastral. Those specimens in which this 

 sulcus cuts the entoplastral can scarcely be specifically separated 

 on this ground alone. 



Hab. Europe (England and France). 



Tlie following specimens are from the Upper Eocene {Lower Oligocene) 

 of Hordwell, Hampshire. 



32349. The nearly entire carapace and plastron of an immature in- 

 (Fig.) dividual. In the carapace the nuchal, pygal, suprapygals, 

 and some of the marginal bones are wanting, and have 

 been restored in plaster. The plastron (fig. 24) is now 

 nearly entire, although it was originally broken into a 

 number of fragments. The gular shields are of great re- 

 lative width ; the entoplastral is wide, and traversed by 

 the humero-pectoral sulcus, and the hyoplastrals resemble 

 No. 30410 e. The xiphiplastrals are short, with the borders 

 of the notch emarginate ; the length of the femoral shield 

 is 0,056 (2-15 inches). 



Hastings Collection. Purchased, 1855. 



32349 x. The posterior extremity of a carapace closely resembling 

 the preceding specimen, and probably referable to the 

 same species. The pygal and suprapygal region is well 

 preserved, and a large number of the marginals, as well 

 as portions of many of the costals of the left side, are 

 shown. Hastings Collection. 



R. 1561. Portions of the carapace and plastron of an individual 

 agreeing in size with the precediug. The portion of the 

 carapace comprises the 4th, 5th, and 6th neurals, the 3rd, 

 4th, and 5th costals of the left side, and the 5th and 6th 

 of the right, together with three marginals on the left and 

 two on the right side. These bones agree almost exactly 

 in size and contour with the corresponding ones of the 

 specimen described as Emys hordwelliensis. There are 

 some detached marginals. The fragments of the plastron 

 comprise the greater portions of the two hypoplastrals 

 and small remnants of the hyo- and xiphiplastrals. The 

 hypoplastrals are of the short form characteristic of the 

 present species. Hastings Collection. 



