150 REPTILES. CHELONIA. Coeiudo. 



Ch. Mydas or Green Tortoise, may, like the two species noticed above, he 

 yet enumerated among our accidental visitants. Neither is it improbable 

 that the relics of the Mud Tortoise and Round Tortoise, both European 

 species, may occur in some of the older members of the "• modern strata" in 

 the southern parts of the island. 



** EXTINCT SPECIES. 



The tortoises of this division appear, from the relics of marine 

 animals, with which they are associated in the different strata, to have 

 been inhabitants of the sea. Baron Cuvier, however, ranks two of 

 our extinct species in his section, " Des Emydes ou Tortues d'eau 

 douce." It is probable that the relics, from the following localities, 

 belong to different species, though the distinguishing characters of 

 these may not, as yet, be sufficiently determined. 



1. The strata in the Isle of Sheppey (Geol. Trans, ii. 205.), regarded as ana- 

 logous to the ',' London clay," contain the remains of a tortoise, which Cu- 

 vier considers as approaching, in some of its characters, to his Emys expansa, 

 (Recherches sur les Ossemens Fossiles, v. p. 2, 234. tab. xv. f. 12.) He is 

 disposed to refer to this extinct species of Sheppey the one noticed by Mr 

 Parkinson, Org. Rem. hi. tab. xviii. f. 2. This last author delineates the 

 head of another tortoise from the same place, ib. f. 3. ; concerning the rela- 

 tions of which Baron Cuvier offers no remark. 



2. A species of tortoise was found by Mr Mantell in the iron sand-beds of 

 Tilgate Forest (Emydis des sable ferrugineux du Comte de Sussex, Rech. 

 Os. Foss. v. 2. p. 232.) Baron Cuvier thinks that it bears a near resem- 

 blance to the remains of a species found by Professor Hugi of Soleure, in the 

 Jura limestone, on the left bank of the Aar. 



3. The argillaceous limestones, termed Purbeck beds, and which belong to 

 the upper division of the oolitic series, furnish bones, and even nearly com- 

 plete specimens of fossil turtles. — Geol. of England and Wales, p. 172. 



4. In the Stonesfield slate, referred to the lower division of the Oolitic 

 series, remains of two or three species of tortoises occur — Geol. Eng. and 

 Wales, p. 208. 



5. The Lias has furnished bones and palates of a species of turtle. — Geol. 

 Eng. and Wales, p. 267- 



SAURIA. 



Gen. I. LA.CERTA. Lizard.— Tongue bifid. Palate and 

 jaws with teeth. Five toes, with nails on each foot. 



1. L. ag'ilis.' Nimble Lizard. — Back with dark bands. Tail 

 annulated with sharp scales. 



L. flavi coloris, Sibb. Scot. 13 — L. vulgaris, JRay, Quad. 264 — L. agilis, 

 Linn. Syst. i. 363 Scaly Lizard, Penn. Brit. Zool. hi. 21 — S, Man- 

 keeper;' G, Dearc luachair — In warm sandy situations. 



