1. CHAMELEON, 471 



extremity of the snout equals or exceeds the length of the mouth ; 

 lateral crest strong, tubercular ; male with two long, conical, horny 

 rostral processes, close together at the base, directed straight 

 forwards ; two conical tubercles represent these horns iu the female ; 

 head-scales very unequal in size; no trace whatever of occipital 

 lobes. Body covered with small flat scales intermixed with very 

 large round flat tubercles ; males with a high fin-like crest on the 

 back and base of tail, supported by the much-produced spinous 

 vertebral processes ; this crest scarcely developed in the female ; 

 no gular nor ventral crest ; throat with enlarged tubercles. No 

 tarsal process. Tail a little shorter than head and body. 



millim. millim. 



Total length 219 160 



From end of snout to extremity of man- 

 dible 27 22 



From end of snout to extremity of casque 37 28 



Eostral horn 12 — 



Depth of skull (mandible included) .... 25 18 



Width of head 16 14 



Body 87 68 



Tibia 19 15 



Tail 105 70 



Camaroons. 



a, b. (5 & hgr. Camaroons. D. G. Rutherford, Esq. [C.]. 



c-h. cf , 2 , & yg. Camaroons. 



41. ChamaBleon cristatus. 



Chamaeleo cristatus, Gray, Cat. p. 2G4. 

 Chamaeleo cristatus, Stutchhury, Trans. Linn. Soc. xvii. 1837, p. 361, 



pi. X. ; J. A. Smith, Proc. Phys. Soc. Edinb. iii. 1866, p. 228 ; 



BuchhoJz, Man. Berl. Ac. 1874, p. 8.3. 

 Pterosaurus cristatus, Gray, Proc. Zool. Soc. 1864, p. 473. 



Casque strongly raised and obtusely pointed or rounded posteriorly, 

 without parietal crest ; the distance between the commissure of the 

 mouth and the extremity of the snout exceeds the length of the 

 mouth ; lateral crest strong, tubercular, obsolete on the canthus 

 rostralis ; no rostral appendages ; head-scales small, not very un- 

 equal ; no trace whatever of occipital lobes. Scales of body finely 

 granular, intermixed with scattered, feebly enlarged, round flat 

 tubercles ; in both sexes, a high fin-like crest on the back and base 

 of tail, supported by the much-produced spinous vertebral processes ; 

 no gular nor ventral crest : scales bordering the lower lip more or 

 less distinctly tubercular. No tarsal process. Tail considerably 

 shorter than head and bodv. A whitish median ventral line. 



