SNAKES. 189 



teen rows (exceptionally in fifteen or seventeen), those of the 

 back equal to the others, exceptionally rather larger ; anal en- 

 tire ; subcaudals two-rowed. Posterior maxillary tooth longest, 

 grooved ; anterior ones equal in length. South America. 



Brachyruton, Oxyrhopus, Dwm. Sf Bibr. vii. p. 1002, &c. Ly- 

 eodon, sp., Schleg. Ess. ii. p. 122, &c. Oxyrhopus, Erythrolam- 

 prus, sp., Cloelia, sp., Wagl. Nat. Syst. Amph. pp. 185, 187. 

 Natrix, sp., Coluber, sp., auct. prior. 



1. Oxyrhopus pl.umbeus. 



Coluber plumbeus, Wied, Reise nach Brasil. i. p. 9b ; Beitr. i. 

 p. 314 ; Ahhildg. xiii. pi, 6. Duberria plumbea, Fitz. Neue Class, 

 der Kept. p. 56. Hydroscopus plumbeus, Fitz. Syst. Rept. p. 25. 

 Boie, Isis, 1825, p. 53/ ; Duvernoy, Ann. Sc. Nat. xxvi. pi. 7. 



f. 3, 4, anatomy ; Schleg. Ess. pi. 6. f. 3-4. Brachyruton plum- 

 beum, Dum. Sf Bibr. vii. p. 1004. 



Above uniform lead-coloured, beneath whitish ; loreal short. 



a. Adult : head injured. Caraccas. From Paris. 



b. Adult : tail injured. Demerara. Presented by Capt. Sabine. 



c. Adult. Berbice. 



d. Adult. West Indies. Presented by Colonel Reid. 



e. Adult : head injured. America. From Mr. Mather's Collection. 

 /. Adult : bad state. America. Presented by the Zoological 



Society. 



g. Half-grown. America. From the Haslar Collection. 



2. Oxyrhopus cloelia. 



Coluber cloelia, Daud. Hist. Rept. vi. pi. 78. Natrix cloelia, 

 Merr. Tentamen, p. 98. Cloelia daudini, Fitz. Neue Classif. der 

 Rept. p. 55 ; Wagl. Syst. Rept. p. 187- Deiropeda cloeha, Fitz. 

 Syst. Rept. p. 25. Cloelia (Natrix) occipitalis, Wagl. I. c, and 

 Serp. Bras. pi. 6. f. 2. Lycodon cloelia, var., Schlegel, Essai, 

 p. 115. Brachyruton cloelia, Dum. Sc Bibr. vii. p. 1007. 



Pale brown or whitish, each scale brown-edged; head and 

 neck dark brown with a white collar. Loreal short. 



a. Ten inches long. Surinam. 



b. Ten inches long. America. 



c. Twenty inches long. America. From the Haslar Collection. 



d. Twelve inches long. Demerara. From Mr. Snellgrove*s 



Collection. 

 e,f. Twenty-six inches long. South America. From the Col- 

 lection of the Zoological Society. 



