TESTTJDINID^. 91 



Testudo, sp. 



Known by an anterior marginal, which indicates a species about 

 two and a half times the dimensions of T. radiata. This marginal 

 agrees with the corresponding bone of T. radiata and T. atlas in 

 having its longer diameter at right angles to the periphery of the 

 carapace, and is thereby distinguished from T. ele+iliantina (see 

 p. 74). This form may be identical with the Miocene T. gigas, 

 Bravard 1 . 



Hah. Europe (France). 



R. 414. The second marginal bone of the left side ; from the Upper 

 Eocene (Lower Oligocene) Phosphorites of Bach, near 

 Lalbenque (Lot), France. Longer diameter 0,140 (5-5 

 inches), shorter diameter 0,080 (3*15 inches). 



Purchased, 1884. 



Genus HOMOPUS, Dumeril & Bibron 2 . 



Shell with the general characters of that of Testudo, but with the 

 neural bones (fig. 17) mostly hexagonal, and the anterior ones more 

 or less distinctly short-sided behind. Epiplastrals only slightly 

 thickened anteriorly. Caudal shield undivided ; vertebral shields 

 hexagonal and comparatively wide. Palate without oral ridge. 



Homopus scutella (Meyer 3 ). 



Syn. Emys scutella, Meyer 4 . 



Known only by flattened shells, which apparently indicate a 

 species closely allied to the existing South-African H. areolatus, 

 with which the fossil agrees in size, and in the swollen dorsal 

 shields, of which the areolae were depressed and surrounded by 

 concentric grooves. 



That the plastron was suturally united with the carapace in this 

 form was first pointed out by Winkler in the work cited below. In 

 the type specimen figured by Meyer in his ' Siiugethiere etc. aus dem 

 Molasse,' pi. 7. fig. 2, the form of the first three costals and also 

 the characteristic alternation in the length of the extremities of the 

 costals are clearly shown. 



Bab. Europe (Switzerland). 



1 See Gervais, Zool. et Pal. Fraii9aises, 2nd ed. p. 436. 



2 Erpetologie generale, vol. ii. p. 145 ('1835). 



3 Fauna der Yorwelt — Saiigethiere, &c. aus dem Molasse, p. 17 (1845). — 

 Emys. 4 Loc. cit. 



