REPTILES. 597 



with distinctly defined toes, furnished with crooked nails ; toes more or less 

 palinated, five on the anterior feet, and four on the posterior feet. 



Emys Europcea — Speckled Tortoise. Plate Ixii. fig. 8. Shell ovate, a 

 little convex, smooth, black, ornamented with yellow radiated dots; disc 

 t-omposed of 13 scutellse, and the margin of 25; under shell cream. yellow, 

 hrown at the joints ; the skiu Of the neck lax and wrinkled. Fifteen inches 

 long. Inhabits Europe. 



Genus Z—ClSTVXi A..— Fleming. 



Generic Character. — Upper shell emarginate in front, having- two notclies 

 behind ; under shell with one or two moveable divisions ; lips horny. 



Division III. — Marine Tortoises. 



Genus 4.— CHELONURA.— Pte/jmg-. 



Generic Character. — Extremities incapable of being- withdrawn under the 

 shield ; back plate carinated, -with acute processes behind ; tail about the 

 length of the shield. 



Chetonura Serpentina. — Snake Tortoise. Obloug-.ovate, considerably do- 

 pressed, with a double carina, posterior margin rounded, and acutely serrat- 

 ed; tail the same length as the body. Four feet long. Inhabits North 

 America. 



Genus 5.— CHELONIA.— i?ro«5-«jar;. 



Generic Character. — Feet produced, in the shape of scaly fins ; toes elon- 

 gated, and unequal, covered with scales, and united by a membrane, their 

 exterior edge provided with small nails, and terminated by laminated scales. 



Chelonia mydas. — The Green Turtle. Plate Ixii. fig. 2. Shell pale brown, 

 with variegated undulations, heart-shaped, pointed at the extremity, with 

 13 dorsal scutella, and 25 marginal plates. Six feet long. Inhabits the West 

 Indian Seas. 



Genus G.—CmSSjY&.—Dumeril. 



Generic Character.- Lips fleshy, mouth cleft across, with a produced 

 snout; toes webbed; hind feet with a protuberance occupying the place of 

 webs, but destitute of a claw ; limbs of the animal not contained within the 

 shell 



Genus n.—TRlCO^YX.—Geoffroy. 



Generic Character. — Back plate destitute of scales, but covered with a 

 coriaceous skin, studded near each extremity with hard knobs ; lips fleshy ; 

 nostrils prolonged into a cylindrical tube j three only of the five toes furnish, 

 ed with nails. 



ORDER II.— SAURIA. 



Body elongated, covered with scales ; four feet for the most part ; some 

 have claws, and others are without them ; tail more or less elongated : mouth 

 furnished with teeth. 



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