REPTILIA. 321 



in regions far remote, eatable, the shell is not made use of. Chelonia 

 imbricate ScHW., Testudo imbricata L., LAC. Quadr. ovip. I. PL 2, 

 SCHOEPFF L L Tab. 18, Cuv. R. Ani., ed. ill., Kept. PL 6, fig. 2 ; with 

 smooth horny scales on the dorsal shield covering each other like house- 

 tiles, of a yellow colour with black dashes ; this species occurs in various 

 seas of warm regions, especially in the East Indies, and affords the best 

 tortoise-shell. The ancients were used to inlay boxes and even couches 

 with tortoise-shell, of which CARVILIUS POLLIO set the example. 



Dermatochelys LESUEUR, Sphargis MERR., DUM., and BIBR. Back 

 covered with leathery skin, in younger individuals warty. Nails 

 none. 



Sp. Chelonia coriacea, Testudo coriacea L., LAC. Quadr. ovip. I. PL 3, 

 SCHLEGEL Faun. Japan., Kept. Tab. i.; Cuv. R. Ani., ed. ill., Rept. PL 7, 

 fig. i (younger specimen) ; this species attains a length of 6 8' ; it lives in 

 various seas, occurring now and then in the North Sea, on the coasts of 

 England and France 1 . 



The form of the anterior fin in the turtles nearly resembles that of the 

 wings in the genus of the Penguins (Aptenodytes). 



[Extinct genera of reptiles occur in the secondary and tertiary 

 formations. Some of these are of peculiar interest as forming con- 

 necting links not only between remote families of reptiles, but also 

 between the class of reptiles and the other classes of vertebrate 

 animals. 



Besides CUVIEB Ossements fossiles, V. 2, we refer especially to OWEN 

 Report on British Fossil Reptiles, Report of the Brit. Association for 1839, 

 PP- 43 12 6, ibid, for 1841, pp. 60 204, also (published by the Palaeonto- 

 graphical Society, London) OWEN On the Fossil Reptilia of the London 

 Clay, Pt. i. Chelonia, 1849, ibid- Pk TI - Crocodilia and Ophidia, 1850, ibid. 

 On the Fossil Reptilia of the Cretaceous Formations, 1851, ibid. Fossil 

 Chelonian Reptiles of the Wealden Clays and Purbeclc Limestone, 1853, ibid. 

 Fossil Reptilia of the Wealden Formations, Pt. in. Megalosaurus JBuck- 

 landii, 1856. 



Saurobatrachi. 



Cryptobranchus primigenius VAN DER HOEV. See p. 242. From 

 the tertiary freshwater lime formation at (Eningen. 



Labyrinthodon OWEN, Mastodonsaurus JAEGER. General charac- 

 ter of skull batrachian, with affinities to the crocodilian structure 



1 Here probably is to be referred the account of a large turtle on the coast of 

 ealand ; Jos. VAN IPEREX Verhandelingen van Tiet Zeeuwsch Genootschap, vi. biz. 620. 



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