224 SNAKES OF THE PHILIPPINE ISLANDS 



Table 48. — Measurements and scale counts of Dryophis preocularis sp. nov. 



" Tip of t;=(il missing. 



BEADLY POLSONOrS SXAKES 



ELAPID^ 



An erect, grooved or perforated fang on the anterior portion 

 of the anterior maxillary bone, or several anterior maxillary 

 teeth grooved or perforated; in either case connecting with a 

 poison gland; othervi^ise, as the Natricida^. Deadly poisonous. 



The family corresponds to Boulenger's group C, of the family 

 Colubridse, which he calls Proteroglypha. The family Elapid^ 

 is composed of two subfamilies ; the first group consists of aqua- 

 tic or semiaquatic snakes; the second, of land snakes. 



Key to the subfamilies of the Elapidx. 



a'. Tail compressed into a vertical fin _ Hydriiiie (p 225) 



a". Tail cylindrical; poison fangs strongly developed... Elapins (p' 254)! 



