100 REPTILES. 



d. Half-grown. N. America. From Mr. Cuming's Collection. 



e. Half-grown. Mexico. From M. Salle's Collection. 



B. Black colour predominant. 



/. Adult. North America. 



g. Adult. Mexico. From Hugo Finck's Collection. 



A. Adult. Berbice. 



i. Adult. North America. 



k. Half-grown. Brazil. 



I. Half-grown. Brazil. Presented by Edward Cook, Esq., R.A. 



m. Young. Interior of Brazil. From Dr. Gardiner's Collection. 



n. Young. North America. From the Haslar Museum. 



6. Spilotes pcecilostoma. 



Coluber pcecilostoma, Wied,Beitr. p. 251 ; Ahhildg. x. t. 1,2. 

 Thamnobius pcecilostomus, Fitz. Syst. Rept. p. 26. Natrix sul- 

 jdiurea, Wagl. 8f Spix, Serp. Bras. t. 9 (the Caninana) ; Schleg. 

 Ess. t. 6. f. 5, 6. Spilotes pcecilostoma, Dum. Sf Bibr. vii. p. 221. 



Scales keeled, large, in twenty-one rows; three posterior 

 oculars. Colour variable, yellowish or olive or brown, with 

 more or less distinct, darker, irregular, oblique cross bands; 

 keels strong, forming together longitudinal brown lines. 



a. Adult : bleached. North America. 



A. Male. Lips, chin, and front of belly yellow. 



h. Adult. Brazils. Presented by Lord Stuart. 



c. Half-grown. North America. From the Collection of the 



Zoological Society. 



B. Female. Lips, chin, and front of belly reddish brown. 



d. Adult : injured. Demerara. From Mr. Snellgrove's Col- 



lection. 



e. Adult. North America. Presented by the Zoological Society. 



7. Spilotes pcecilonotus. 



Scales in twenty-one or twenty-three rows, those of the back 

 keeled; two posterior oculars. Above uniform brown, some 

 scales of the medial row yellow with black tip ; head yellowish, 

 variegated with brown ; belly anteriorly uniform yellowish, pos- 

 teriorly uniform black. 



a. Adult. Honduras. 



h. Adult. Mexico. From Hugo Finck's Collection. 



Description. — Body elongate, compressed ; tail slender ; head 

 moderate, rounded in front, distinct from neck ; eye large ; mouth 



