286 SNAKES OF THE PHILIPPINE ISLANDS 



whom it has been named, states that it is not rare on Batan 

 Island. In a memorandum dated June 12, 1907, he states the 

 following : 



Our party went to the summit of the mountain. On the return a 

 large yellow snake was found resting at about 2 meters from the ground 

 coiled on some leaves that had lodged among the thick stems of a kind of 

 large grass. 



The snake was struck with an alpen-stock and fell to the gTound. In 

 attempting to put a string on its neck I was scratched by the fangs, 

 between the last two joints of my thumb. Mr. H. G. Ferguson immediately 

 made several cuts across the wound with a pocket knife and tied a string 

 around the thumb. My hand and forearm were swollen by evening. The 

 swelling subsided within a couple of days. There was very little pain, 

 and no further trouble was experienced. 



TRIMERESURUS HALIEUS Griffin* 



Ti-imeyisiii-ns haliens Griffin, Philip. Journ. Sci. § D 5 (1910) 214 

 (T)-imerisurus err. typ.) § D 6 (1911) 267. 



Description of species. — (From No. 772, Bureau of Science 

 collection; collected on Polillo, October 1, 1909, by C. Canoni- 

 zado) . Head broadly triangular ; canthus rostralis rather 

 rounding; rostral broader than high, bordered behind by 2 inter- 

 nasal scales ; supranasals somewhat enlarged ; nasal irregular, 

 undivided, a small scale between nasal and first 2 labials ; first 

 labial small, triangular; second high, entering pit and forming 

 its anterior border, in contact with the elongate canthal scale 

 which lies between the 2 superior preoculars and with the nasal ; 

 pit surrounded by 2 preoculars and first labial; supraocular en- 

 larged, irregular in shape ; a narrow elongate subocular, touch- 

 ing inferior preocular and third and fourth labials (third only on 

 left side) ; separated from other labials by a single row of scales; 

 3 preoculars, 3 postoculars; 10 upper labials, 12 lower labials; 

 3 labials border the single pair of chin shields ; mental triangular, 

 pointed behind; 12 scales between supraoculars; 28 scales across 

 head between angle of jaws; temporal scales rather enlarged, 

 not keeled; scales on head irregular in size and shape, rather 

 rounding, and not or but slightly imbricate, not keeled; scales 

 on posterior part of head imbricate and pointed ; scale rows on 

 neck (counting from tenth ventral), 25; on body 21; median 10 

 rows of scales distinctly keeled, more prominently on posterior 

 part; ventrals, 178; subcaudals, 56; tail distinctly prehensile; 

 anal single. 



* In establishing this species Griffin had before him ten specimens from 

 Pohllo, the only locality where it has been found. No particular specimen 

 was designated as the type. 



