154 reptiles. 



4. Ah^tulla mexicana. 



Leptophis mexicana, Dum. 8f Bibr. vii. p. 53. 



Like A. Uocercus, but one loreal shield. Scales keeled, two 

 post-oculars, eight upper labial shields. Bright blue-green iri- 

 descent, white beneath ; a black streak across the eyes and cheeks. 



a. Many specimens. Mexico. From Mr. Warwick's Collection. 



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



c. Young. Mexico. 



d. Adult. Belize. Presented by J. Smith, Esq. 



e. Adult. Honduras. 

 /. Adult. Honduras. 

 ff. Young. Honduras. 



h. Adult : injured. America, 

 i, k. Adult. America. 



5. Ah^tulla catesbyi. 



Dendrophis catesbyi, S'c^Ze^'. ^55. ii. p. 226. Uromacer catesbyi, 

 Dum. Sf Bibr. vii. p. 721. 



Head depressed, elongate, rounded in front ; above uniform 

 bluish green without any spot, beneath pale, an obsolete whitish 

 band along the sides of abdomen ; scales smooth, in seventeen 

 rows J anal bifid. 



a. Adult. Hayti. Presented by the Zoological Society. 



b. Adult : injm-ed. St. Domingo. FromMr. Cuming's Collection. 



c. Half-grown. St. Domingo. From the Leyden Museum. 



d. Half-grown. Barbadoes. From Mr. Cuming's Collection. 



e. Adult. America. From Mr. Mather's Collection. 



6. AHiETULLA OXYRHYNCHA. 



Uromacer oxyrhynchus, Dum. Sf Bibr. p. 722. pi. 83. f. 1. 



Head depressed, elongate, pointed in front; above uniform 

 bluish green without any spot, beneath pale, an obsolete whitish 

 band along the sides of abdomen ; scales smooth, in nineteen 

 rows ; anal bifid. 



a. Adult : in good state. St. Domingo. From Mr. Cuming's 

 Collection. 



Although the specimen described by Dumeril and Bibron is 

 said to be a native of Africa, and although our specimen has the 

 anterior frontals horizontally divided into two (which may be 

 considered as an individual peculiarity), we have no doubt that 

 both specimens belong to one and the same species. It is closely 

 allied to the preceding species, having the very same lanceolate, 

 not very imbricate, sharply pointed, rhomboid scales ; it has the 



