(2) _D. intestinalis._--Brown or black on the back, with darker or lighter longitudinal streaks; tail red beneath; belly red, crossed with black streaks. Total length, 580 millimetres; tail 45. _Habitat_: Burma, Malay Peninsula, Sumatra, Java, Borneo, Celebes. (3) _D. bilineatus._--Black on the back, with two white streaks along the whole length of the body. Snout white; belly striped with black and white bands. Tail orange, with two or three black rings or spots. Total length, 710 millimetres; tail 45. _Habitat_: Philippine Islands. (4) _D. philippinus._--Back with dark brown cross-bands, merging into black transverse ventral streaks, which are separated by yellow or red interspaces. Head brown, with small yellow spots. Total length, 430 millimetres; tail 35. _Habitat_: Philippine Islands. II.--FAMILY VIPERIDÆ. The Family VIPERIDÆ is represented in Asia by a considerable number of snakes belonging to the two Subfamilies VIPERINÆ and CROTALINÆ. The Asiatic VIPERINÆ belong to the genera:-- (a) _Vipera._ (b) _Pseudocerastes._ (c) _Cerastes._ (d) _Echis._ The CROTALINÆ consist of only two genera:-- (e) _Ancistrodon._ (f) _Lachesis._ 1.--VIPERINÆ. (a) =Vipera.= We shall not recapitulate here the characters of the Genus _Vipera_, which we described in dealing with the vipers of Europe. The genus is represented by several species, the geographical range of which is chiefly confined to Eastern and Central Asia. * * * * * (1) _Vipera renardi._--Resembles _V. berus_, but the snout is pointed and soft, with a turned-up tip; a single series of scales between the eyes and the lips; nostril pierced in the lower half of a single nasal shield; 8-9 supralabial shields; 4 infralabials. Body scales in 21 rows; 130-150 ventrals; 24-37 subcaudals. Coloration the same as in the European _V. ursinii_, but the snout and lips are spotted with black or brown. Total length, 395-620 millimetres; tail 40-75. _Habitat:_ Central Asia, Turkestan. * * * * * (2) _V. raddii._--Snout rounded; supraocular shields erectile; eyes surrounded by a complete circle of 14-17 scales; 9-10 supralabials; body scales in 23 rows; 150-180 ventrals; 23-32 subcaudals. Coloration pale brown or grey on the back, with a dorsal series of small reddish spots arranged in alternating pairs. A black mark like a circumflex accent on the occiput, and a black band behind the eyes. Belly yellow, speckled with black and white. Total length, 740 millimetres; tail 50. _Habitat_: Armenia. * * * * * (3) _V. lebetina._--Snout rounded and obtuse, with a well-marked prominence; 7-12 longitudinal series of scales between the eyes; supraocular shields well developed or narrow, or broken up into several small portions; 12-18 scales round the eyes; 9-12 supralabials; 4-5 infralabials; body scales in 23-27 rows; 147-180 ventrals; 29-51 subcaudals.