SNAKES. 57 



Var. C. Shields of head hke in the former, but anal plate 

 entire. 

 u. Half-grown. Pernambuco. Presented by J. P. G. Smith, 



Esq. 

 V. Half-grown. Brazil. From M. Clausen's Collection. Each 



posterior frontal divided into two. 



5. Xenodon typhlus. 



Coluber t^^)hlus, Linn. Syst. Nat. i. p. 378 ; Lacep. Quadr. 

 Ovip. ii. p. y>S2; Latr. Rept. iv. p. 77 ; Baud. Rept. iv. p. 135. 

 Xenodon typhlus, Schleg. Ess. ii. p. 94 ; Dum.. 4' Bibr. p. 760. 



Scales in rather obhque rows, smooth; anal bifid; body 

 rounded; head and shields moderate; above uniform bluish 

 olive, beneath uniform yellowish. 



a. Adult. Berbice. Presented by Lady Essex. 



b, c. Half-grown. Sine patria. Stevens's sale. — We are in 



some uncertainty as to whether these specimens belong 

 really to the above species, having the scales only in seven- 

 teen longitudinal rows, and a lateral row of spots, confluent 

 in a streak on the tail ; there is moreover a black margin 

 above the upper labials. 



. Xenodon viridis. 

 Dum. c^ Bibr. vii. p. 763. ? Tropidonotus plumbicolor. Cantor, 

 Proc. Zool. Soc. 1839, p. 54. 



Scales keeled, in twenty-five rows. Uniform dirty green, witli 

 a more or less obsolete darker blotch on the side of the neck. 

 Young specimens greenish, with a broad, white, black-edged 

 collar, pointed in front ; the anterior black edge very broad, the 

 posterior narrow ; on the sides of the body some black, narrow, 

 transverse streaks ; the belly is more uniform black, the younger 

 the individual. 



a. Adult. Madras. Presented by W. Elhott, Esq. 



b-e. Young. Madras. Presented by W. Elliott, Esq. 



/. Adult. Bengal. Presented by Sir E. Home. The black 



transverse streaks still conspicuous. 

 g. Adult : not good state. India. Presented by W. Masters, 



Esq. 

 /t. Half- grown: bad state. India. Presented by W. Masters, 



Esq. 

 ». Young. India. Presented by W, Masters, Esq. 

 k. Adult. Sine patria. 



D 5 



