LIST OF ILLUSTRATIONS. 



PAOE 



Fig. 1. — A. Skull of one of the non poisonous Coluhridce {Ptyas inucosus) 7 



B. Skull of one of the poisonous Coluhridce (Naja tripudians) 7 



c. Skull of one of the poisonous Coluhridce (Bunf/arus fasciatus) 7 



D. Skull of one of the Viperidce (Vipera russellii) ... ... ... 7 



E. Skull of one of the Viperidce Crotalince {Crotalus dwrissus) ... 7 



F. Skull of one of the Coluhridce Hydrophiince {IIydrop}iisp>elamis) 7 

 Fig. 2. — A. Maxillary bone and fangs of one of the Viperidce {Vijjera 



russellii) ... ... ... ... ... ... ... ... 8 



B. Maxillary bone and fangs of one of the Coluhridce {Naja tripu- 

 dians) ... ... ... ... ... ... ... ... 8 



c. Maxillary bone and fangs of one of the Coluhridce {Bungarus 



fasciatus) ... ... ... ... ... ... ... .. y 



D. Maxillary bone and teeth of one of the non- poisonous Colu- 

 hridce (Ptyas mucosus) ... ... ... ... ... ... 8 



. — A. Fang oi one oi the Vip>eridce (VijJera russellii) ... ... ... 8 



D. Transverse section of the fang ... ... ... ... ... 8 



. — B. Fang of one of the Coluhridce (Naja' tripudians) ... ... 9 



E. Transverse section ... ... ... ... ... ... ... 9 



. — c. Fang of one of the Hydrophiince (Hydropiliis pelamis) ... ... 9 



F. Transverse section ... ... ... ... ... ... ... 9 



. — Three transverse sections of a poison-fang of one of the Coluhridce 9 

 . — Mai'ks produced on the skin by the bites of different species of 



snakes ... ... ... ... ... ... ... ... 10 



. — Poison-gland and fangs of a venomous snake {Naja tripudians)... 11 



. — Muscular apparatus and poison-gland of Vipiera russellii ... 12 



. — Muscular apparatus and poison-gland of Vipera russellii ... 12 



. — Muscular apparatus and poison-gland of Naja tripudians ... 13 



. — Muscular apparatus and poison-gland of Ncrja tripudians ... 13 

 . — Arrangement of the scales of the head in one of the non-poisonous 



Coluhridce {Ptyas mucosus) ... ... ... ... ... 14 



Fig. 14. — Arrangement of the scales of the head in one of the poisonous 



Coluhridce {Naja tripudians) ... ... ... ... ... 15 



Fig. 15. — Feeding a poisonous snake (first stage) ... --. ... ... 18 



Fig. 16. — Feeding a poisonous snake (second stage) ... ... ... ... 18 



