CHELONID^J. 65 



however, not shown, and since there is no description the adoption 

 of this, the earliest name, seems inadvisable. 

 Hob. Europe (England). 



R. 1483. Cast of the imperfect adult skull, with portions of the 

 hyoids in position. The original, which is the type, was 

 obtained from the London Clay (Lower Eocene) of Har- 

 wich, Essex, and is preserved in the Wood^vardian 

 Museum, Cambridge. Noticed by Owen in the ' Rep. 

 Brit. Assoc' for 1841, p. 178, and described and figured 

 by him in his ' Eeptilia of the London Clay, &c.' vol. i. 

 pt. i. p. 25, pi. ix. Also described, with a figure of the 

 occipital aspect, by Seeley, in the ' Ann. Mag. Nat. Hist.' 

 ser. 4, vol. viii. p. 230. In the parietal region the bones 

 are wanting in places, and the tip of the muzzle is broken 

 away. In the mandible, although the anterior portion of 

 the symphysis is wanting, yet the symphysis in its present 

 condition has a length exceeding that of the postsymphysial 

 part. The imperfect carapace which appears to have been 

 associated with this skull, and is figured by Owen, op. cit. 

 pi. x., and of the fall size in his ' History of British Eossil 

 Eeptilia/ Chelonia, pi. xix., is stated by Seeley (op. cit. 

 p. 227) to have perished. In that specimen the anterior 

 and posterior lateral surfaces of the neurals are equal ; 

 while, as pointed out by Seeley (op. cit. p. 228, note), 

 there is a small ninth costal, without a rib. The peculiar 

 form of the coracoid is well displayed in that specimen. 



Made in the Museum, 1889. 



37215. Cast of an imperfect young skull apparently belonging to 

 this species. The original was obtained from the London 

 Clay of the Isle of Sheppey, and is stated by Owen to 

 have formerly been in the Dixon Collection. It is one of 

 the types of Emys parMnsoni, Gray, and is figured 

 (reversed) by Parkinson in his ' Organic Remains,' vol. iii. 

 pi. xviii. fig. 3 ; the cranium being figured by Owen in 

 his ' Eeptilia of the London Clay, &c.' vol. i. pt. i. pi. vi. 

 fig. 4, and the mandible in pi. vii. fig. 3, as Chelone conveoca. 

 The extremity of the mandibular symphysis is wanting, 

 but the remaining portion has the marked flatness 

 characteristic of the present genus, and shows the same 

 general contour as in the smaller specimens of L. canta- 

 brigieiise. Except for the larger relative size of the orbits, 

 which is merely a character of immaturity, the specimen 

 paet in. F 



