12 



VENOMS 



A A, Fascia oovei-- 

 ing the anterior and 

 posterior temporal 

 muscles ; B, small 

 gland ; c, tendin- 

 ous insertion of the 

 fascia ; D, poison- 

 duct ; E, poison- 

 fang ; F, reserve 

 fangs ; G, mandible : 



H, ectopterygoid^muscle ; j, poison-gland covered by the masseter ; K, 

 in the mandible ; L, insertion of the temporal muscle ; m, digastric m 



masseter inserted 

 uscle. 



A A, Ectopterygoid muscle l, 

 prx'-spheno pterygoid muscle , l, 

 intermandibular muscle ; D.prfe- 

 spheno-palatine muscle ; E, prre- 

 spheno-vomerine muscle ; f, cap- 

 sule of mucous membrane sur- 

 rounding the fangs; o, 

 muscle of the neck. 



Pigs. 9 and 10. — Muscular Apparatus and Poison-gland of Vipera 

 [Viper idf/-). (After Sir Josepli Fayrer. 



