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7 upper labials, the third and fourth entering the orbit. Anal 

 bifid. Crown of the head and back uniform olive. A broad 

 black band begins behind the eye, gradually narrowing and dis- 

 appearing at less than half the length. A dark streak runs from 

 the throat along the outer edges of the ventrals, of equal length 

 with the last. Below uniform yellowish. 



Grows to 27 inches. (Tail.) 



Inhabits the Khasi hills and Mesopotamia. 



C. calamaria, Giinther. 



Rostral shield as high as broad. Prsefrontals rather broader 

 than long. Postfrontals much broader than long. Loreal shield 

 none, united with the nasal. One prseocular. Two postoculars. 

 7 upper labials, the third and fourth entering the orbit. Anal 

 bifid. Colour brownish grey above, each scale with two minute ■ 

 indistinct brown streaks at the base.- The scales on each side of 

 the back black edged, forming small irregular spots more or less 

 confluent posteriorly. Below white. In very young specimens 

 a black bar crosses the occipitals. 



Grows to 14 inches. (Tail 4.) 



Inhabits Ceylon. 



C. nasalis, Giinther. 



Very like calamana, but has two prseoculars. Colour greyish 

 olive above. A slightly curved black streak on each side of the 

 neck, followed by a series of black spots, confluent with a band 

 running along the edges of the fifth and sixth outer rows of 

 scales, disappearing on the tail.' A dark line disappearing ante- 

 riorly marks the edges of the third and fourth outer rows of 

 scales. Below whitish. 



Grows to 16 inches. (Tail 4.) 



Inhabits India. 



C. monticola, Ca,ntor. 

 Rostral shield narrow, much higher than broad. Prefrontals 

 twice as broad as long and one-third as large as the postfrontals. 

 Nostril an oblique slit directed forwards in a single nasal plate 



