606 REPTILES. 



ORDER IV.— BATRACHIA. 



Heart with one auricle ; body covered with a naked cuticle ; providea 

 with luugs in the natural state ; but with branchiae, like fishes in their im- 

 mature condition before they are transformed. 



Genus l.—UA'SA.—LinncEUS. 



Generic Character— Body slender ; fore-legs short; feet with generally 

 four toes, free ; hind-legs long ; muscular feet with five toes, usually pal- 

 mated to the extremities ; skin smooth ; upper jaw provided with a row of 

 small teeth, and an interrupted transverse one in the middle of the palate ; 

 males with a thin extensible membrane under the ear, which is inflated with 

 air when they croak. 



nana esculentu.— The Green Frog. Plate Ixv. fig. 3. Described, vol. iv. 

 p. 93. 



Genus 2. — HYLA.—Cuvier. 



Generic Character.— Body somewhat compressed, elongated, and smooth ; 

 tongue short and thick ; fore-feet provided with four toes, free ; hind-feet 

 with five, all clawless, but in their stead, venticular tubercles; male with a 

 pouch under the throat, capable of being inflated. 



Bi/la arborea.— The Tree Frog. Plate Ixv. fig. 11. Described, vol. iv. 

 p. 95. 



Genus 3.—BUF0.—Cuvier. 



Generic Chara<:ter.-Head with a broad projection behind tlie ears ; jaws 

 without teeth ; body thick, short, and broad, covered with warted papilla? 

 .ibove, from which exudes a fetid fluid ; eyes large and projecting ; fore 

 feet with four free toes ; hind feet short, with five toes, mostly palmated. 



Biifo calamitii.— The Mephetic Toad. Plate Ixv. fig. 6. Olive-green 

 above, with brown spots, reddish waits, and a line of sulphur- yellow down 

 the middle of the back ; pale-gray beneath. Inhabits Europe. 



Bufo cornutus.— The Horned Toad. Plate Ixv. fig. 10. Described, vol. 

 iv. p. 109. 



Genus i.— TIP A.— Laurent!. 



Generic Character.— Body considerably depressed ; head large and trian. 

 gular ; destitute of a tongue ; tympanum concealed under the skin ; eyes 

 small, situated towards the margin of the upper jaw ; toes of the fore feet 

 with four toes free, and furnished with radiated somewhat obtuse points ; 

 largest of the male very long and triangular; hind feet with five toes webbed 

 to the points, and furnished with nails. 



Pipa Surinamenses The Surinam Pipa. Plate Ixv. fig. 8. Described, 



vol. iv. p. 109. 



Genus 5.— SALAMANDRA.— 5ro«^niarf. 



Generic Character.— Wend depressed ; body elongated ; tail long, cyhn. 

 rfrical in some species, and depressed in others ; ears hidden, and with a mi. 



