SNAKES. 177 



1. Rhinobothryum lentiginosum. 



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

 iii. t. 20. f. 2. Rhinobothryum macrorhinuin, 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. 4* Bibr. vii. p. 456. Dipsas, sp., 

 Laurenti, Syn. Rept. p. 90 ; Schinz, Thierreich,p.l\7 ; Boie, 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.e. p. 679; Lacep. I. c. p. 271; Bonnat. I.e. pi. 19. 

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

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

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

 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 



i5 



