PROTEIDJi. 83 



acuminate ; nostrils small, close to the tip of the snout, near the 

 labial border ; eyes very small ; upper and lower labial lobes much 

 developed. Limbs extremely small ; digits 3 — 3. Tail short, com- 

 pressed, keeled above. Skin smooth, slimy. Uniform blackish 

 brown, somewhat lighter beneath. 



Total length 755 millim. 



From snout to cloaca 575 „ 



Head 40 „ 



• Width of head 31 „ 



Fore limb 13 „ 



Hind limb 21 „ 



Tail 180 „ 



Mississippi and Louisiana. 



a. Adult. Louisiana. 



b. Hgr. Florida. Dr. B. Harlan [P.]. 



c. Adult. Mexico (?). 



d. Young. ? 



2. Amphiuma means. 



Amphiuma means, Gray, Cat. p. 55. 

 Amphiuma means, Garden, I. c. ; Hotbr. N. Amer. Herp. v. p. 89, 



pi. 30 ; Bum. # Bibr. p. 203. 

 Chrysodonta larvseforrnis, Mitch. I. c. 

 Amphiuma means s. didactyla, Cuv. Mem. Mus. xiv. p. 4, pi. 1. 



f. 1-3. 



didactyla, Wagl. Syst. Amph. p. 209. 



Sirenoides didactylum, Fitz. I. c. 



Digits 2 — 2. Otherwise as in the preceding. 



S.E. United States, from North Carolina to Mississippi. 



a-c. Hgr. & yg. N. America. T. Bell, Esq.. [P.]. 



Fam. 3. PROTEIRffi. 



Sirenidaj, part., Gray, Ann. Phil. 1825. 



Proteidese, part., Tschudi, Classif. d. Batr. 



Proteidao, Gray, Cat. Batr. Grad. 



Trematoderes proteides, part., Dum. fy Bibr. Frp. Gen. ix. 



Proteidae, Cope, Journ. Ac. Philad. (2) vi. 1866. 



Ichthyodea, part., Straiich, Rev. d. Salam. 



Two genera : — 



Digits 4 — 4 ; eyes exposed 1. Necturus, p. 83. 



Digits 3 — 2 ; eyes hidden 2. Proteus, p. 85. 



1. NECTURUS. 



Necturus, Rafin. in de Blainv. Journ. Phys. lxxxviii. (1819), p. 417; 

 Wagl. Syst. Amph. p. 210 ; Gray, Cat. p. 66. 



g 2 



