•44 



ZOOTOMY. 



of the septum, passes almost directly outwards, and then bending down- 

 wards, furnishes the lateral wall of the capsule, finally turning inwards 

 towards the base of the septum to form its floor. Each capsule is per- 



o.c 



Fig. 37. — Lacerta viridis. The chondrocranium from above (after 

 W. K. Parker) X 4- The cartilaginous parts are dotted, the mem- 

 branous spaces cross-hatched. 



a/.s, alisphenoid : a.s.r, position of anterior semicircular canal : ^. k, 

 external nares : c/, epiotic : e.^i, epi pterygoid : _/«(, foramen magnum: 

 /o, fontanelle : /i.s.c, position of horizontal semicircular canal : i.o.s, 

 interorbital septum ; na, nasal capsule : o.c, occipital condyle : J>.oc, 

 parotic process : J>r.o, prootic : p.s.c, position of posterior semicircular 

 canal ; s.n, septum nasi : s.o, supraoccipital. 



forated by the anterior nares in front, by the posterior nares below, 

 by the foramen for the olfactory nerve behind, and above by a cres- 

 centic slit, the olfactory fenestra. 



