Iiepdles from Perak, Mahiij Peninsula. 307 



Snout projecting beyond tlie lower jaw ; rostral considerably 

 broader than deep ; frontal very small, longer than bro.id, as 

 long as its distance from the rostral ; one prte- and one i)o-5t- 

 ocular ; a single anterior temporal ; seven upper labials, third 

 and fourth entering the eye, second largest and in contact 

 Avith the prftfrontal ; two pairs of small chin-shields, in con- 

 tact with each other. 31 scales round tlie neck, 55 round the 

 body ; scales smooth, rhomboid il and imbricate anteriorly, 

 elsewhere hexagonal, subimhricate, each with one or several 

 small tubercles. Ventrals very small but distinct throughout, 

 422. Head and neck black, the latter with two series of 

 round yellowish spots ; body yellowish white, with a series of 

 blackish rhomboidal spots on the back, these spots conHuent 

 on the vertebral line ; end of tail black. 



Tolal length 620 millim. ; tail 47. 



Very closely allied to H. fasciatusi, Schn., from which it is 

 distinguished by the broader rostral, the greater number of 

 scales round the body, and the coloration: the pattern of the 

 latter can, however, be derived without difficulty from that of 

 II. fascidius. 



Distira Wrayl. 



Head moderate ; body elongate, its greatest depfih twice 

 and one third the diameter of the neck. Uostral considerably 

 broader than deep ; nasals a little shorter than the frontal, 

 twice as long as the suture between the prasfrontals ; frontal 

 nearly twice as long as broad, slightly shorter than its 

 distance from the rostral, two thirds the length of the 

 ]!arietals ; one prte- and one postocular ; a single very large 

 anterior temporal, nearly reaching the oral border ; seven 

 upper labials, second largest and in contact with tlie prje- 

 frontal, third and fourth entering the eye; two pairs of chin- 

 shields, in contact with each other. The head-shields studded 

 with small granules. Scales feebly imbricate, very strongly 

 keeled, many of the keels broken up into two tubercles; 27 

 scales round the neck, 37 round the body. Ventrals 29t5, 

 small but distinct throughout, bicarinate, the keels mostly 

 broken up into tubercles. Tail ending in a spine-like com- 

 pressed scale. Blackish, with 67 narrow light annuii, which 

 are olive on the back, yellow on the sides and on the belly. 



Total length 940 niillim. 



A single male specimen from the Perak coast. 



^J'his well-marked species appears to be most nearly related 

 to D. tuherculata, Anderson, which is known to me only from 

 the description. 



Amhlycephalas vertehralis. 



Rostral slightly broader than deep ; internasals a little 



20* 



