SNAKES. 



177 



1. Rhinobothryum lentiginosum. 



Coluber lentiginosis, Scopoli,Delic.Flor.et Faun. Insul. Austr. 

 iii. t. 20. f. 2. Rhinobothryum macrorhinum, Wagl. I. c. Dipsas 

 macrorhina, Schleg. Ess. pi. 11. f. 31, 32. Rhinobothryum len- 

 tiginosum, Dum. Sf Bibr. p. 1061. 



Whitish, with large, broad, brown rings; each shield of head 

 with a brown spot in the centre. 

 a. Adult. Tropical America. From Mr. Mather's Collection. 



7. Leptognathus, Dum. Sf Bibr. 



Body more or less compressed and elongate ; head high, 

 quadrangular, with blunt, rounded muzzle, more or less distinct 

 from neck ; rostral shield not produced backwards ; loreal gene- 

 rally wanting ; one or two anterior, generally two posterior ocu- 

 lars ; scales moderate, smooth, in thirteen or fifteen rows ; those 

 of the vertebral row larger, six-sided; subcaudals two-rowed. 

 Eye and nostril moderate. Teeth equal, smooth. South Ame- 

 rica; India. 



Petalognathus, Dipsadomorus, Leptognathus, Anholodon = 

 Leptognathiens, pt., Dum. fy Bibr. vii. p. 456. Dipsas, sp., 

 Laurenti, Syn. Rept. p. 90 ; Schinz, Thierreich,]). 117 ; Bote, Isis, 

 1827, p. 549; Wagl. Syst. p. 181 ; Schleg. Ess. ii. p. 257- Bun- 

 garus, sp., Oppel, Ann. Mus. d'Hist. Nat. 1810, p. 392. Coluber, 

 sp., auct. prior. 



1. Leptognathus nebulatus. 



Sibon, Seba, i. 14. 4, ii. 29. 3. Coluber nebulatus, L. Mus. 

 Ad. Fried, t. 24. f. 1, and Syst. Nat. p. 383 ; Daub. Quadr. Ovip. 

 Serp. p. 657; Weigel, Abh. der Hallens. Naturf. Gesellsch. i. 

 p. 32; Lacep. Quadr. Ov. Serp. ii. p. 307; Bonnat. Encycl. Ophiol. 

 pi. 20. f. 38 ; Merr. Beitr. i. pi. 8, and Tent. p. 104 ; Shaw, Gen. 

 Zool. iii. p. 476 ; Latr. Rept. iv. p. 177 ; Daud. Rept. vi. p. 413 ; 

 Kuhl, Beitr. zur Zool. p. 88. Coluber sibon, Linn. Syst. Nat. 

 p. 383 ; Daub. I. c. p. 679 ; Lacep. I. c. p. 271 ; Bonnat. I. c. pi. 19. 

 f. 35 ; Shaw, I. c. p. 507 ; Latr. 1. c. p. 164 ; Daud. 1. c. p. 435 ; 

 Merr. Tent. p. 130. Dipsas nebulata, Boie, Isis, 1827, p. 560 ; 

 Schleg. Ess. pi. 11. f. 14, 15. Petalognathus nebulatus, Dum. $ 

 Bibr. vii. p. 464. 



Body and tail moderately slender, rather rounded ; loreal shield 

 none, replaced by the large'single ante-orbital ; upper labials seven ; 

 first pair of lower labials forming a suture together ; three pairs 

 of chin-shields behind, the first of which is three times as long 



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