A, Tracheo mastoid muscle; BB, digastric muscle; cc, posterior temporal muscle ; 
DD, anterior temporal muscle ; EE, masseter; F, poison-gland, covered by the masseter 
and fascia ; G, poison-duct ; H, maxillary bone; 1, neuro-mandibular muscle ; J, costo- 
mandibular muscle. 
A, Entopterygoid muscle; B, 
poison-gland ; c, poison-duct ; 
D, poison-fangs; E, præ-sphe- 
no-palatine muscle; F, præ- 
spheno-vomerine muscle; a, 
capsule of mucous membrane 
surrounding the fangs ; H, præ- 
sphenopterygoid muscle (which 
erects the fangs) ; 3, inter-man- 
dibular muscle; x, ectoptery- 
goid muscle ; L, long muscle 
of the neck (longus colli). 
Figs. 11 AND 12.—Muscunar APPARATUS AND POISON-GLAND OF Naja tripudians 
(Colubride). (After Sir Joseph Fayrer.) 
