CHELONID^E. 55 



26130. The slightly imperfect symphysis, and part of the right 

 {Fig.) ramus of a similar but smaller mandible ; from Brackles- 



ham. Figured by Owen in Dixon's ' Geology of Sussex,' 

 pi. xiii. figs. 5-7, and also in his ' History of British Fossil 

 Reptilia,' Chelonia, pi. xxv. figs. 5-7, where it is referred 

 to the present species. Dixon Collection. 



R. 1491. Cast of the entire mandible. The original was obtained 

 from Bracklesham, and is preserved in the Museum of 

 Practical Geology, Jermyn Street. It differs from the 

 two preceding specimens by the inferior surface of the 

 symphysis being less flattened, but this can scarcely be 

 regarded as more than a sexual difference. 



Made in the Museum, 1889. 



R. 1025 a. A mandibular symphysis of nearly similar type ; from 

 Bracklesham. This specimen is slightly narrower than 

 the last. Presented by P. E. Combe, Esq., 1888. 



26132. The imperfect symphysis of a similar mandible ; from the 

 (Fig.) Middle Eocene of Bracklesham, Sussex. One of the types 



of Chelone acuticeps ] ; figured by Owen in Dixon's ' Geology 

 of Sussex,' pi. xiii. fig. 18, and also in his ' History of 

 British Fossil Reptilia,' Chelonia, pi. xxv. fig. 18. 



Dixon Collection. Purchased, 1851. 



26131. Part of a larger mandibular symphysis of the same general 

 (Fig.) type as the preceding; from Bracklesham. Figured by 



Owen, op. cit. figs. 8, 10, as Chelone acuticeps. 



Dixon Collection. 



26133. An imperfect mandibular symphysis probably referable to 

 (Fig.) this form ; from Bracklesham. Figured by Owen, op. cit. 



fig. 9, as Chelone longiceps. Dixon Collection. 



28087. Three specimens of the imperfect symphyses of mandibles 

 of the same general type as the preceding ; probably from 

 Bracklesham. Presented by F. E. Edwards, Esq., 1852. 



26134. Four portions of mandibular symphyses of the same general 



type ; from Bracklesham. Dixon Collection. 



R. 1480. Mass of clay showing the dorsal aspect of a sacrum and 

 first caudal vertebra, probably referable to this species ; 

 from Bracklesham. Hastings Collection. 



1 This name would appear to be due to an error, since in the text all the 

 specimens are referred to Chelone longiceps. 



