82 



AMPHIUMIDjE. 



close to the labial border ; eyes extremely small. Body squat, de- 

 pressed. Limbs short, stout ; fingers and toes short, depressed ; 

 outer fingers and toes and limbs externally bordered with much 

 developed membranes. Tail short, strongly compressed, finned, 

 the end rounded. Skin very porous, smoothish ; head with scat- 

 tered tubercles ; sides of body with a well-marked thick cutaneous 

 fold. Brown or greyish, with darker blotches ; tips of fingers and 

 toes yellowish. 



Total length 418 millim. 



From snout to cloaca 280 „ 



Head 44 „ 



Width of head 50 „ 



Fore limb 42 „ 



Hind limb 49 „ 



Tail 138 „ 



All tributaries of the Mississippi, and streams of the Louisiana 

 district to North Carolina. 



a, b. HgT. Ohio. 



c-d. Adult. Pennsylvania. 



(In one of the specimens the right spiraculum has disappeared, as 

 the advanced larvae of most tailless Batrachians.) 

 e,f. Adult & hgr. N. America. 



Menopoma fascum, Holbr. I. c. p. 99, pi. 33, is probably only a 

 variety of this species. Reddish brown above, whitish beneath, 

 immaculate. Head-waters of the Tennessee River. 



3. AMPHIUMA. 



Amphiuma, Garden, in Smith's Correspondence of Linnceus, i. p. 599 ; 



Wayl. Syst. Amph. p. 209 ; Tschudi, Batr. p. 67 ; Gray, Cat. p. 55 ; 



Bum. 8f Bibr. ix. p. 201. 

 Chrysodonta, Mitchill, Medical Recorder, 1822, p. 529. 

 Sirenoides, Fitziny. Syst. Rept. p. 34. 

 Muraenopsis, Fitziny. I. c. ; Gray, I. c. 



Tongue indistinct, covering the floor of the mouth, entirely ad- 

 herent. A strong series of vomerine teeth, parallel with the inter- 

 maxillary and maxillary teeth. Bpiracula present. Four branchial 

 arches. Limbs rudimentary ; digits two or three. 



North America. 



1. Amphiuma tridactyla. 



Muramopsis tridactyla, Gray, Cat. p. 55. 

 Amphiuma tridactyla, Cuv. Mem. Mus. xiv. p. 7, pi. 1. f. 4-6; 



Holbr. N. Amer. Herp. v. p. 93, pi. 31 ; Tschudi, Batr. p. 97 ; 



Bum. $ Bibr. p. 203 ; Ryder, Proc. Ac. Philad. 1879, p. 14. 

 Muramopsis tridactyla, Fitziny. Syst. Rept. p. 34. 



Body much elongate, eel-like. Head small ; snout elongato, sub- 



