ORDER BATRACHIA. 411 



It inhabits the rivers of the interior and great 

 lakes. 



Amphiuma, Garden, 



Have also an orifice on each side of the neck, but 

 their body is excessively elongated ; their legs and 

 feet, on the contrary, are very little developed, and 

 their palatine teeth form two longitudinal ranges. 



There is one species with three toes on all the 

 feet, (^Ampliium, Tridactylmn^ Cuvier) and one with 

 two toes only, (^Amphium Means. Gard. and Har- 

 lan, Mem. du Mus. XIV. pi. 1.)* 



Among those which always preserve their gills. 



The AxoLOTs 



Resemble in every point the larvse of the aquatic 

 salamander, having four toes before, and five be- 

 hind, three long gills in the form of tufts, &c. 

 Their teeth are smooth at the jaws, and in two 

 bands on the vomer. vSuch is. 



The Axolotl of the Mexicans. (^Siren Piscifoi^mis, 

 Shaw. Gen. Zool. vol. III. part ii. pi. 140. Hum- 

 boldt Obs. Zool. I. pi. 12.) 



* Linnaeus was acquainted with the Amphiuma, but too late to insert it 

 in one of the editions of his system, which appeared in his life-time. It 

 has been described since, by Dr. Mitchell, under the name of Chrysodonta 

 Larvceformis ; and by Dr. Harlan, under that of Amphiuma. I have pub- 

 lished the species Aviphiuma Tridactylum, which is of Louisiana, and attains 

 to the length of three feet. See the Mem. of Mus. tom. XIV. 1. I suspect 

 that it is of this species that Barton speaks, as of a siren of three feet, in 

 his letter on the siren. 



