GENERAL CLASSIFICATION OF POISONOUS SNAKES 13 



A, Tracheo. mastoid muscle; eb, digastric muscle ; cc, posterior temporal muscle; 

 D D, anterior temporal muscle ; e e, masseter ; f, poison-glaQd, covered by the masseter 

 and fascia ; G, poison-duct ; h, maxillary bone ; i, neuro-mandibular muscle ; j, costo- 

 mandibular muscle. 



A, Entopterygoid muscle ; B, 

 poison gland ; c, poison-duct ; 

 D, pjison-fangs ; E, prie-sphe- 

 no-palatine muscle; F, prse- 

 eno-vomerine muscle ; g, 

 capsule of mucous membrane 

 surrounding the fangs ; H, prte- 

 sphenopterygoid muscle (which 

 erects the fangs) ; j, inter-man- 

 dibular muscle ; k, ectoptery- 

 goid muscle ; L, long muscle 

 of the neck (longus colli). 



Figs. 11 and 12. — Muscular App.aratus and Poison-gland of Naja tripudians 

 {Colubridu:'). (.^fter Sir Joseph Fayrer.) 



