437 



SERENUS. 



Serpens Cenchrus, vel Serenus Brasiliensis. Seb. 2. if. 42./. 2. 



About the size of the preceding : colour above 

 blue, with a moderately broad dorsal sea-green 

 stripe, marked with a few small, distant, black 

 spots : the sides marked with deep blue or blackish 

 spots : head of moderate size, large-scaled, and 

 marked at the top by a large and somewhat trian- 

 gular white spot pointing backwards : abdomen 

 white, the scuta pretty deeply edged or variegated 

 with dark brown: tail gradually tapering to a 

 fine point : native of Brasil. 



LOZENGE-SPOTTED SNAKE. 



Coluber Rhombeatus. C. glaucus, maculis rhombeatis nigrkan- 



tihus medio cceruleis. 

 Glaucous Snake, with blackish lozenge-shaped spots blue in 



the middle. 



Coluber Rhombeatus. Zm. Sysf. Nat. p, 380. Mm. Ad, Irid. 

 p. 27. t. 24./. 2. 



Vipera Cencoatl dicta. Seb. 2. t. 26. f. 1,2,3? 

 Serpens Amboinensis tigrina. Seb. 2. t. 15. f. 2, 

 Abdominal scuta 157, subcaudal scales 70. 



General length from two to three feet or 

 more : colour grey or brownish, with three alter- 

 nating, longitudinal rows of ovate, but somewhat 

 rhomboid, dusky spots with large blueish centres: 

 head rather large than small : abdomen pale or 

 whitish, often clouded with blueish grey : the 



