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COLUBER.—Linnzus. Cuvier. Wagler. 
Genus Coruser.—Cuaracters. Head elongated, distinct from the neck, and 
covered with plates above; snout rather rounded; eyes large, pupil round; two 
posterior orbital plates; loral plate single; body elongated, and ribs so articulated 
with the vertebre that the animal cannot flatten itself during life; tail generally 
long, and always with bifid plates or scutelle below. 
Remarks. To avoid the introduction of a useless genus, where the only 
difference between the animals that I have as yet observed, is in having scales 
slightly carinated, it will be necessary to arrange the Colubers in two sections— 
those with smooth scales, and those with scales slightly carinated. 
1—Colubers with Smooth Scales. » 
COLUBER CONSTRICTOR .—Linnzus. 
Plate XI. 
Cuaracters. Head oval, long; snout prolonged and rather pointed; body and 
tail long and slender; colour above, uniform bluish-black; abdomen slate-colour, 
tinged with blue; chin and throat silver-white, with occasional black spots. PI. 
176. Sc. 94. 
Synonymes. Black Snake, Catesby, Carol., &c., vol. ii. p. 48, pl. xlviii. 
Coluber constrictor, Linnewus, Syst. Nat., tom. i. p. 385. 
Black Snake, Kalm, Tray., Foster’s Trans., vol. ii. p. 202. 
