1864. ] DR. J. E. GRAY ON THE CHAMELEONID®. 473 
Hab. West Africa (Richardson), Gaboon (Bowdich), the type 
specimen described by Dr. Leach; S. Africa, Latakoo (4. Smith), 
Port Natal (Rev. H. Calloway, Ayres). 
2. APoLa. 
Nose of both sexes simple; orbit rounded. Chin and belly den- 
tated. Back compressed ; upper edge flat, with a series of minute 
scales on each side. Occiput keeled. Scales granular, equal. 
1. APOLA LATERALIS. B.M. 
Chameleo lateralis, Gray, Cat. B. M. 264; A. Dum. Arch. du 
Mus. vi. t. 22. f. 6 (head). 
Pale brown, with a narrow, continued pale streak on the middle of 
the sides ; ventral line white. 
Hab. Madagascar, 
Apola lateralis. 
3. PTEROSAURUS. 
Nose and chin simple. Back and tail with a high crest, supported 
by long bony rays. Belly slightly dentated. Chin and back smooth- 
edged. Orbit rounded. Occiput much produced, sloping, acute 
behind, flat above, or rather concave, without any central ridge ; 
hinder sides covered with very small scales. Scales small, with seat- 
tered larger ones. 
1. PTEROSAURUS CRISTATA. B.M. 
Chameleo cristatus, Gray, Cat. B. M. 264. 
Sides with a series of larger circular scales. 
In spirits—red-brown, with numerous large, equal, roundish, white 
spots. 
Hab. Fernando Po; Old Calabar (Murray). 
One of the Museum specimens has two dark spots in front of the 
upper part of the nose over the nostrils. Is this a sexual character? 
4. MicrosauRA. 
The occiput much narrowed and compressed behind, flat above, 
with a slightly raised central keel; the side of the occiput with a 
smooth space, separated from the smooth temple by a central nodulous 
