THE PRINCIPAL SPECIES OF POISONOUS SNAKES 143 
FAMILIES 
VIPERIDÆ | 
| 
SUB-F'AMILIES 
Viperine ... 
Crotalinæ 
Cozugripæ ÆElapine . 
ASIA.—(contd.) 
GENERA 
| Vipera 
a | Pseudocerastes 
Cerastes 
Echis ... 
an Saas 
ee 
| Lachesis 
(3) AFRICA. 
| Boulengerina 
Hlapechis 
Naja 
Sepedon 
Aspidelaps ... 
Walterinnesia 
Homorelaps... 
Dendraspis ... 
| 
| Angola. 
( 
( 
{ 
( 
GEOGRAPHICAL AREA 
De Ural, Siberia, 
Caucasus, Persia, Ar- 
menia, Western China, 
| India, Ceylon, Hima- 
| layas. 
Persia. 
Arabia, Palestine. 
{ Persia, Arabia, India, Balu- 
| chistan, Afghanistan. 
Transcaspia, Turkestan, 
| Himalayas, Southern 
| China, Formosa, Japan, 
| Ceylon, Java. 
South-eastern Asia, India, 
| Southern China, Indo- 
ee China, Formosa, Suma- 
. Central Africa. 
Central and South Africa. 
Egypt, Central and West 
Africa, Morocco, Congo, 
South Africa, Cape of Good 
Hope. 
South and South-east Af- 
rica, Mozambique. 
Egypt. 
(South Africa, Cape of Good 
| Hope. 
eats and South Africa, 
Angola, Great Lakes, 
| Congo, Transvaal. 
