dekmochelyid^e. 225 



dentify this form with P. rupeliensis, Van Beneden *, of the Bupelian 

 (Middle Oligocene) of Belgium, but its much lower geological horizon 

 renders this identification very doubtful. 

 Hah. Europe (England). 



R. 1500. Fragment of the carapace, exhibiting six tesserae, of which 

 two are considerably larger than the others ; probably 

 from the Middle Eocene of Bracklesham, Sussex. Noticed 

 by A. S. Woodward in ' Proc. Geol. Assoc' vol. x. p. 12. 



No history. 



Genus EOSPHARGIS, Lydekker 2 . 



Skull of the general type of that of the preceding genus, but 

 apparently still larger in proportion to the shell, and without 

 distinet maxillo-premaxillary process. Carapace consisting (so far 

 as can be determined) of only a single median row of broad carinated 

 scutes, and a series of marginals on either side. Plastron only 

 known by fragments, but doubtless devoid of tesserae. Humerus 

 with the radial process still longer than in the preceding genus ; its 

 length exceeding the diameter of the middle of the shaft. 



Prom the total absence of all traces of tesserae in the undermen- 

 tioned specimens there can be little doubt that the carapace was of 

 the simple structure above indicated. 



Eosphargis gigas (Owen 3 ). 

 Syn. Chelone gigas, Owen 4 . 



The type, and only species at present known. The limb-bones 

 indicate an animal of somewhat larger size than Psephophorus 

 rupeliensis, with a relatively much larger skull. 



In the memoir published by Owen on this species it is stated that 

 the proximal extremity of the femur figured in his ' Eeptilia of the 

 London Clay ' (Mon. Pal. Soc), vol. i. pt. ii. pi. xxix. fig. 3, should 

 be taken as the type. It seems, however, preferable to take the 

 figured cranium in this sense, more especially since the name given 

 in the ' Palaeontology ' in 1861 was applied on the evidence of the 

 other cranium, and as the femur is not an absolutely characteristic 

 bone. 



Hah. Europe (England). 



J Bull. Ac. E. Belg. ser. 3, vol. vi. p. 684 (1883).— Sphargis. 



2 Quart. Journ. Geol. Soc. vol. xlv. p. 241 (1889). 



3 Reptilia of the London Clay (Mon. Pal. Soc), vol. ii..p. 1 (1880). Also 

 in ' Palaeontology,' 2nd ed. p. 317 (1861), but without description.— Chelone. 



4 Log. cit. 



PART III. Q 



