1, SIBEN. 2. PSETTDOBRANCHUS. 87 



1. Siren lacertina. 



Siren lacertina, Gray, Cat. p. 68. 

 Siren intermedia, id. ibid. p. 69. 

 Siren lacertina, Linn. I.e. ; Cuv. in Humb. Obs. Zool. i. p. 28, pi. 11- 

 14 ; Baud. Rept. viii. p. 272, pi. 49. f. 2 ; Holbr. N. Amer. Hei-p. 

 v. p. 101, pi. 34 ; Tschudi, I. c. ; Dum. # Bibr. p. 193 (part.). 

 Phanerobranchus dipus, Leuckart, I. c. 



Siren intermedia, Leconte, Ann. Lye. N. Y. 1828, p. 133, pi. 1; Holbr. 

 I. c p. 107, pi. 35. 



Body elongate, eel -like. Head rather small ; snout short, broad ; 

 nostrils in the upper lip ; eyes very small ; labial lobes much deve- 

 loped. Limbs short : fingers well developed, pointed. Tail shorter 

 than body, strongly compressed, finned, ending in a point. Skin 

 smooth. Blackish, uniform or with small white dots. 



Total length 670 millim. 



From snout to cloaca 460 



Head (to spiracle) 52 



Width of head 35 



Limb 38 



Tail 210 



S.E. "United States. 



a. Adult. N. America. Dr. Garden [P.], 



b. Adult. N. America. Lord Ampthill [P.]. 

 c-e. Young. S. Carolina. Zool. Soc. 

 /. Hgr. Texas. 

 g. Young. 



— P 



2. PSEUDOBRANCHUS. 



Pseudobranchus, Gray, Ann. Phil. 1825, p. 216, and Cat. p. 69. 



Tongue covering the floor of the mouth, free in front. Jaws with 

 a horny sheath. Vomerine teeth numerous, forming two large 

 patches converging anteriorly. Spiraculum single on each side, 

 below the gills. Limbs two, posterior absent ; fingers three. 



North America. 



1. Pseudobranchus striatus *. 



Pseudobranchus striatus, Gray, Cat. p. 69. 

 Siren striata, Leconte, Ann. Lye. N. Y. 1824, p. 52, pi. 4 ; Tschudi, 



Batr. p. 98 ; Holbr. N. Amer. Herp. v. p. 109, pi. 36 ; Dum. $ 



Bibr. pi. 96. f. 1. 

 Pseudobranchus striatus, Gray, Ann. Phil. 1825, p. 216. 



Body elongate, eel-like. Head rather small ; snout short, narrowed ; 

 eyes small ; labial lobes much developed. Limbs very short ; fingers 

 well developed, pointed. Tail shorter than body, compressed, finned, 



* Described from two specimens in the Paris Museum. 



