BY WILLIAM MACLEAY. 417 



Head broad, flat, rounded at the rauzzle, and very suddenly 

 contracted behind into a very narrow neck. Body elongate, 

 compressed, almost keeled along the centre of the back, and 

 tapering to a very long tine tail. The mouth is much curved, 

 there are nine upper and ten lower labials, the loreal is nearly 

 square, the anterior ocular is large, and the two posterior oculars 

 small. The colour is yellowish-white, closely banded with broad 

 black fasciae from the head to the extremity of the tail ; these 

 fasciae are less continuous on the neck and upper parts, and 

 assume the form of large spots, and even on the hinder parts of 

 the body they are a little interrupted ; they all slope a little 

 backwards, and are never continued on the ventral plates. The 

 most remarkable tiling about this species is the small number of 

 body scales (15 only), whereas in all the other species the 

 numbers are from 19 to 23. It is a very handsome and 

 beautifully marked species, 



DiEMENIA ANGUSTICEPS, n,Sp, 



Scales in 15 rows. 

 Anal plates, 2. 

 Abdominal plates, 201. 

 Sub-caudal plates, 83/83. 

 Total length, 2 feet 1| inch. 

 Tail, 6 inches. 



Of slender form, the head narrow, elongate, and not narrowed 

 behind into a neck ; the posterior frontal shields large, their 

 lateral margin in contact with the posterior nasal ; the vertical 

 and superciliary shields are long, the former scarcely wider at 

 the apex than the base, and a little triangular at both ends ; the 

 posterior nasal is long and narrow, and with the anterior ocular 

 takes the place of the loreal; there are six upper and lower 



