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DESCRIPTION OF A NEW SPECIES OF 

 HOPLOCEPHALUS. 



By William Macleay, F.L.S., &c 



HOPLOCEPHALUS COLLARIS, n. Sp. 



Scales in 1 5 rows. 



Abdominal Plates 147. 



Anal Plate entire. 



Sub-caudal Plates 46. 



Total length 15 inches. 



Length of head to the collar, J inch. 



Length of tail, 3 inches. 



The general colour of the body is dark brown, becoming of a lead- 

 colour towards, and on the sides of, the abdominal plates, and 

 clouded yellowish-white on their middle. The head is broader 

 than the neck, flat, and marked above with a large black patch, 

 which extends, in front to between the eyes, behind for two or three 

 scales behind the occipital shields, and on either side to about a 

 line with the upper margin of the eye ; behind the black patch 

 is a white collar extending over about three scales. The front? 

 sides and under surface of the head are white, speckled with black 

 or dark brown, with a line of larger spots along the upper labial 

 shields, and a narrow black bar from the eye to the nasal aperture. 



The snout is rounded, the anterior frontal shields are not more 

 than half the size of the posterior, which are pentagonal, the 

 vertical is elongate and parallel-sided, the apex narrowly and acutely 

 pointed in the middle, the base triangular between the occipitals, 

 the superciliaries are about the width of the vertical but shorter. 

 There are two posterior ocular shields and one anterior, which last 



