THE SKULL IN THE CHAMELEONS. 105 



PLATE XVII. 



Chamceleo vulgaris. 



Fig. 1. Large male: the skull, longitudinally vertical section, right side, x3 diam. 



Fig. 2. Part of left section of the same skull, x 3| diam. 



Fig. 3. Endocranium of a female, side view, x 3| diam. 



Fig. 4. The same, upper view, x3f diam. 



I'ig. 5. A smaller male : transversely vertical section of decalcified skull through fore 



part of ear-sac (13th section), X 3| diam. 



Kg. 6. Another section, through middle of ear-sac (14th section), X 3| diam. 



Fig. 7. Another section, through hind part of ear-sac (IStli section), x 3| diam. 



PLATE XVIII. 



Chamceleo vulgaris. 

 Fig. 1. Smaller male : decalcified skull (same as in Plate XVII. figs. 5-7), section in 



front of nose (1st section), x3f diam. 

 Fig. 2. The same, through nostrils (2nd section), X 3| diam. 

 Fig. 3. The same, through nostrils further back (3rd section), X 3| diam. 

 Fig. 4. The same, through hind part of nostrils (4th section), X 3| diam. 

 Fig. 5. The same, through hind part of nostrils (5th section), X 3| diam. 

 Fig. 6. The same, through middle of nasal sacs (6th section), X 3| diara. 

 Fig. 6 a. The same object, with bones removed, x7^ diam. 

 Fig. 7. First interorbital section (7th section), x 3f diam. 

 Fig. 8. Second interorbital section (8th section), X 3| diam. 

 Fig. 9. Third interorbital section (9th section), X 3| diam. 



Fig. 10. Fourth interorbital section (10th section) through optic nerve, X3| diam. 

 Fig. 11. Section made between optic and trigeminal nerves (11th section), x3f diam. 

 Fig. 12. Another, through foramina ovalia (12th section), x3| diam. 



PLATE XIX. 



Chamceleo pumilus. 

 Fig. 1. Adult female : the skull, side view, X 6 diam. 

 Fig. 2. The same, lower view, x6 diam. 

 Fig. 3. The same, upper view, X 6 diam. 

 Fig. 4. The same, end view, X 6 diam. 

 Fig. 5. The same, side view of orbital and auditory regions, X 6 diam. 



vou. XI. PART III. No. 8. — March, 1881. 



