164 REPTILES. 



eyes moderate ; posterior maxillary tooth longer and furrowed ; 

 the anterior teeth nearly equal in length. South America. 



Thamnodynastes, Wagler, Nat. Syst. der Amph. p. 182. 

 Dryophylax, Wagler, I. c. p. 181. Dipsas, sp., Schlegel, Dum. 

 8; Bibr. Tropidonotus, Natrix, Coluber, sp., met. prior. 



1. Thamnodynastes nattereri. 



Coluber nattereri, Milan, Delect.; Wied, Beitr. p. 277, and 

 Abbildg. iv. t. 4 ; Fitz. Neue Class, p. 58. Tropidonotus nat- 

 tereri, Boie, Isis, 1827, p. 535. Dryophylax nattereri, Wagl. Syst. 

 Amph. p. 181. Dipsas nattereri, Schleg. Ess. ii. p. 290 ; Dum. 

 6f Bibr. vii. p. 1149. 



Like Th. punctatissimus, but scales keeled, and tail forming 

 not quite a quarter of the total length. 



a. Adult. Brazil. 



b. Adult : not good state. Brazil. From Dr. Gardiner's Col- 



lection. 

 n. Adult. Amazon. From Mr. Bates's Collection. 

 d. Adult. Brazil. From Dr. Gardiner's Collection, 

 e,/. Adult. Brazil. Presented by Dr. Andrew Smith. 

 g. Adult. Rio Janeiro. Presented by A. Fry, Esq. 

 h. Adult. Rio Janeiro. Presented by A. Fry, Esq. 

 i. Adult. Tejuku. Presented by Robert Bennett, Esq. 

 k. Adult. Tejuku. Presented by Robert Bennett, Esq. 



1. Adult : bad state. Demerara. 



m. Many specimens. Demerara. Presented by Dr. Hancock. 

 n-p. Adult : not good state. Demerara. Presented by Dr. 



Hancock. 

 q. Adult. America. 



2. Thamnodynastes punctatissimus. 



Natrix punctatissima, Wagler fy Spix, Nov. Spec. Serp. t. 14. 

 f. 1 . Thamnodynastes punctatissimus, Wagler, Nat. Syst. der 

 Amph. p. 182; Fitz. Syst. Rept. p. 27. Dipsas punctatissima, 

 Schleg. Ess. pi. 11. f. 33, 34; Dum. Sf Bibr. vii. p. 1151. 



Scales smooth; tail forming nearly one-third of the total 

 length. Belly with four longitudinal lines, formed by very 

 minute points, and confluent under the tail. 



a. Adult. Brazil. (Anal bifid.) 



b. Adult. America. From Mr. Argent's Collection. (Anal 



entire.) 



