488 
O. CH. BRADLEY, The muscles of mastication in Lacertilia 
Explanation of the Plates. 
Plate 44. 
M.par-mand M. parieto-mandibu- 
laris (M. digastricus) 
M. cap-mand M. capiti-mandibu- 
laris (M. temporalis). 
M.ptery-mand M. pterygo-mandi- 
bularis (M. pterygoideus externus) 
M. ptery' superficial part of M. 
pterygoideus (M. pterygoideus in- 
ternus) 
M.ptery'' deep part of M. ptery- 
goideus (M. pterygoideus internus) 
M.pt.sph.post M. pterygo-spheno- 
idalis posterior 
M.pt.sph.ant M. pterygo-spheno- 
idalis anterior 
M.pt.par M. pterygo-parietalis 
'M.dep.pal.inf M. depressor pal- 
pebræ inferioris 
Varanus bivittatus. 
Varanus bivittatus. 
Bios. 
Fig. 2. 
M. tr. max. pt.mand M. transverso- 
maxillo-pterygo-mandibularis 
Os. trans Os transversum 
A deep portion of M. capiti-mandi- 
bularis 
B nerve to skin of cheek and M. 
levator anguli oris 
C nerve to M. pterygo-mandibu- 
laris 
D Nerve to Mm. pterygo-sphenoi- 
dalis posterior, pterygo-parietalis, 
and depressor palpebre inferioris 
E smooth surface on pterygoid 
bone for “articulation” with Os 
complementare 
N. 5" N. maxillaris 
N. 5“ N. mandibularis. 
Superficial muscles. 
After removal of Mm. capiti-mandi- 
bularis, parieto-mandibularis and pterygo-mandibularis. 
Fig. 3. 
removed. 
Fig. 4. 
and columella removed. 
Varanus bivittatus. 
Fig. 5. Dipsadomorphus dendrophilus. 
Deep muscles (after KATHARINER). 
Fig. 6. Vipera berus. 
Superficial part of M. pterygoideus 
Varanus bivittatus. Deep group of muscles. Quadrate 
Deep muscles. 
