590 GRIFFIN. 



Polyodontophis bivitattus Blgr.t 



Found only in Palawan. The two specimens upon which Boulenger's 

 description is founded are the only ones which have been collected. 



Watrix spilogaster (Boie).t 



Pound only in tlie Philippines. This is the most common snake in 

 some parts of the Islands, but Everett's specimen is the only one so far 

 recorded from Palawan. 



Natrix chrysaryga (Schleg.)* f J 



Found only in Palawan and Balabac of the Philippine Archipelago. 

 This species is found outside the Philippines in Java, Sumatra, Borneo, 

 India and China. 



Ophites aulicus (Linn.)* 



First collected in Palawan by Weber. Common throughout south- 

 eastern Asia, the Malay Archipelago, and the Philippines. 



Ophites subcinctus (Boie).* 



Found in Palawan, Mindanao, the Malay Peninstila and Archipelago. 

 This is the first record of its occurrence in Palawan. 



Dryocalamus philippinus n. sp.f 



Maxillary teeth 8; the last two considerably larger than the others, 

 compressed toward their points, and separated from the first six by a 

 short space. The anterior mandibular teeth are slightly longer than the 

 posterior. There is one distinct tooth-like knob on the basisphenoid. 

 Width of head almost twice that' of the neck; head much depressed and 

 flattened. Eye large, pupil vertically elliptic. Body slightly compressed 

 and slender. Scales smooth, no pits. Ventrals and subcaudals strongly 

 keeled, the latter in two rows. 



Rostral nearly twice as broad as deep, just visible from aljove; nasal 

 entire; suture between internasals slightly longer than between prsefron- 

 tals; frontal longer than its distance from the end of the snout, a 

 little shorter than the parietals; loreal longer than deep, entering the eye; 

 one small prae-ocular above the loreal; two post-oculars; temporals 2-)-3; 

 seven upper labials, the third and fourth entering the eye; four lower 

 labials in contact with the anterior chin-shields, wliich are longer than the 

 posterior. 



Black above, with three white stripes extending from the head to the 

 tip of the tail, each stripe being one scale wide; the stripes are separated 

 from each other and the white lower surface by two scale-rows; the 

 outer row of scales on each side is white; upper lip, angle of jaw, and 

 lower surface of head white; dark brown stripes pass along each side of 

 the head, thi'ough the eyes, meet on the occipital region and join the 

 dark stiipes on each side of the neck ; central portion of frontal and 



