12 



VENOMS 



A A, Fascia cover- 

 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, masseter inserted 

 in the mandible ; l, insertion of the temporal muscle ; m, digastric muscle. 



\ 



A A, Ectopterygoid muscle ; b, 

 prse-sphenopterygoid muscle ; c, 

 intermandibular muscle ; d, prse- 

 spheno-palatine muscle ; e, prge- 

 spheno-vomerine muscle ; f, cap- 

 sule of mucous membrane sur- 

 rounding the fangs ; G, loug 

 muscle of the neck. 



Figs. 9 and 10. — Muscular Apparatus and Poison-gland of Vipeirt russellli 

 (Viperidce). (After Sir Joseph Fayrer. 



