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LIST OF ILLUSTRATIONS. 
1.—a. Skull of one of the non-poisonous Colubride (Ptyas mucosus) 
B. Skull of one of the poisonous Colubride (Naja tripudians) 
c. Skull of one of the poisonous Colubridæ (Bungarus fasciatus) 
Dd. Skull of one of the Viperidæ (Vipera russellit) ... 
E. Skull of one of the Viperide Crotaline (Crotalus durissus) 
Fr. Skull of one of the Colubridæ Hydrophiine (Hydrophis pelamis) 
2.—a. Maxillary bone and fangs of one of the Viperide ve 
russellit) ge 
B. Maxillary bone and fangs oon one e ae Calabria (Nana tripu- 
dians) sf 
c. Maxillary bone and fangs a one af the Colubr Ate (Banca 
fasciatus) : 
pb. Maxillary bone and beet aE one os He non- Here Co 
bride (Ptyas mucosus) 
3.—A. Fang of one of the Viperide (aes russe aI) 
D. Transverse section of the fang 20 
4,—B. Fang of one of the Colubride (Naja Epa didi) 
E. Transverse section 
5.—c. Fang of one of the nie (Hydrophis Feline 
F. Transverse section 
6.—Three transverse sections of a ere ns ae one a ine Goren Wa 
7.—Marks produced on the skin ui the bites of different species of 
snakes : 
8.—Poison-gland and fangs of a venomous vanes Gas tr Fond 
9.—Muscular apparatus and poison-gland of Vipera russellii 
10.—Muscular apparatus and poison-gland of Vipera russellii 
11.—Muscular apparatus and poison-gland of Naja tripudians 
12.—Muscular apparatus and poison-gland of Naja tripudians 
13.—Arrangement of the scales of the head in one of the eee ee 
Colubride (Ptyas mucosus) 1e 
14.—Arrangement of the scales of the head in one of dre poisonous 
Colubride (Naja tripudians) 
15.—Feeding a poisonous snake (first stage) 
16.—Feeding a poisonous snake (second stage) . 
BD 
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