SNAKES. 61 



a. Species allied to T. natrix. 

 1. Tropidonotus natrix. 



Natrix torquata, Gesner, De Serpent. Nat. p. 110; Merr. Tent. 

 p. 124 ; Ray, Synops. Animal, p. 334 ; Seba, ii. 4. Coluber 

 natrix, Linn. Mus. Ad. Fried, t. 21. f. 2, and Syst. Nat. i. p. 380 ; 

 Boddaert, Nov. Act. C<es. Leop. 1783, p. 24; Lacep. Quadr. 

 Ovip. Serp. ii. p. 147 ; Shaw, Zool. iii. p. 446 ; Daud. Rept. vii. 

 p. 34 ; Lair. Rept. iv. p. 38 ; Merr. Tent. p. 124 ; Lenz, Schlangen- 

 kunde, p. 485 ; Sturm, Deutsche Fauna, p. ; Cuv. Regne 

 Anim. Tropidonotus natrix, Boie, Isis, 1827, p. 534 ; Wagler, 

 Syst. Amph. p. 179; Schleg. Ess. ii. p. 302; Bonap. Faun. Ital. 

 pi. ; Eichw. Faun. Caspio-Caucas. t. 22. f . 1,2; Dum. $f Bibr. 

 p. 535. 



Scales in nineteen rows ; upper labials seven, the third and 

 fourth touching the eye ; one anterior, three posterior oculars ; 

 anterior frontals not pointed, rather obtuse in front. Generally 

 olive, with a series of narrow black spots on each side ; generally 

 on each side of the neck a broad yellow, behind black-edged 

 collar-like spot ; belly with large oblong black spots. 



The structure and number of the shields and scales are the 

 most constant characters in the species. 



a. Adult. England. Presented by H. Harrison, Esq. 



b. Adult and foetus : bad state. England. 



c. Young. England. 



d. Young. England. Presented by the Zoological Society. 

 e,f. Adult. Devonshire. Mus. Leach. 



g, h. Half-grown and young. Devonshire. Mus. Leach. 



i. Foetus and eggs. Cobham. Presented by General Buckley. 



k. Half-grown : not good state. South Europe. Presented by 



P. B. Webb, Esq. 

 I. Adult. Sine patria. Stevens's sale. 

 m. Adult. Sine patria. 



n. Adult. Sine patria. Purchased of Mr. Gardiner. 

 o, p. Half-grown. Sine patria. From Mr. Warwick's Collection. 

 q. Half-grown. Sine patria. Presented by Mr. Mauge. 

 r. Young. Sine patria. Purchased of Mr. Leadbeater. 

 s. Two-headed monstrosity. ? 



Var. A. colchica, Nordmann in Demidojfs Voyage dans la 

 Russie Merid., Rept. t. 12. f. 1. 



No specimen in the British Museum. 



Var. B. Collar black. 



t. Adult. Bononia. Presented by J. J. Bianconi. 



u, v. Half-grown. Bononia. Presented by J. J. Bianconi. 



