LACERTILIA. 351 



crests on tho inalo, C. Amer., B americanus to 3 ft. ; Brachylophus 

 Wagl., Fiji and Friendly Islands ; Cachryx Cope, Yucatan ; Callisaurus 

 Blainv., S.W. N.-Amer. ; Chalarodon Ptrs., Madagascar ; Chamaeleolis 

 Coct., Cuba; Connlophus Fitz., herbivorous, edible, Galapagos; Cory- 

 thophanes Boie, C. Amer. ; Crotaphytus Holbr., S. N.-Amer. ; Ctenoble- 

 pharis Tsch., Peru ; Ctenosaura Wiegm., C. Amer. ; Cyclura Harl., 

 W. Indies ; Diplolaemus Bell, Patagonia ; Dipsosaurus HaU, S.W. N.- 

 Amer. ; Enyalioides Blgr., Veragua to Peru ; Enyalir^ Wagl., S. Amer. ; 

 Helocephalud Pliil., Atacama and N.W. la Plata ; Holhrookia Gir., S. N.- 

 Amer. ; Hoplocercus Fitz., S. Amer.; Hoplunis Cuv., Madagascar ; Iguana 

 Laur., attain to 5-6 ft., herbivorous, esteemed as food, they live in trees, 

 trop. Amer. and W. Indies ; Laemanctus Wiegm., C. Amer. ; Liocephalus 

 Gr., digits mth keeled lamellae, W. Indies and S. Amer. ; Liolaemua 

 Wiegm., Amer. S. of equator, about 25 species ; Liosaurus D. and B., 

 S. Amer. ; Metopoceros Wagl., W. Indies ; Norops Wagl., trop. Amer. ; 

 Ophryoessa Fitz., S. Amer. ; Petrosaurus Blgr., Lower California ; Phry- 

 nosomu Wiegm., homed toads, N. Amer., and Mexico ; Phymaturus 

 Gravh., ChiU ; Pneustes Merr., Paraguay ; Polychrus Cuv., abdominal 

 ribs, colour very changeable, digits with carinated lamellae ; trop. 

 Amer. ; Prislidactylus Fitz., Patagonia; Saccodeira Gr., S. Amer. ; Sauro- 

 malus A. Dum., S.W. N.-Amer. ; Scartiscxis Cope, Paraguay ; Sceloporua 

 Wiegm., N. and C. Amer. ; Stenocerctia D. and B., W.S. Amer. ; Strobilurus 

 Wiegm., Brazil ; Tropidodactylus Blgr., Venezuela and W. Indies ; Tro- 

 pidurus Wied., S. Amer., digits with keeled lamellae ; Uma Baird, 

 Arizona ; Uraniscodon Kaup, S. Amer. ; Urocentron Kaup, S. Amer. ; 

 Urostrophus D. and B., S. Amer. ; Via B. and G., N.-Amer. and Mexico ; 

 Xiphocercus Fitz., trop. Amer. 



Fam. 7. Xenosauridae. Pleiirodont, teeth numerous, small, with long 

 cylindrical shafts not hollowed out at the base ; anterior part of tongue 

 retractile ; palatines widely separate ; T-shaped interclavicle ; osteodermal 

 plates absent from the body. Xenosaurus Ptrs., with one species, S. 

 Mexico. 



Fam. 8. Zonuridae. Plem-odont, teeth as in preceding, but hollowed 

 out at the base ; tongue short not retractile ; supratemporal fossa roofed 

 over by dermal ossifications ; palatines and pterygoids widely separated, 

 interclavicle cruciform ; no abdominal ribs. Zonurus Merr., dermal 

 ossifications on the trunk and tail, S. Air. and Madagascar ; Pseudo- 

 cordylus Smith, S. Afr. ; Platysaurua Smith, S. Afr. ; Chamaesaura 

 Schn., snake-hke body and reduced Umbs. S. Air. 



Fam. 9. Anguidae. Pleurodont, teeth soUd at the base, new teeth 

 originate between the old ones ; teeth may be present on the pterygoids, 

 palatines and vomers (Ophisaurus) ; anterior part of tongue emarginate, 

 retractile into the posterior part ; osteodermal plates on head and body ; 

 palatines and pterygoids well separated ; limbs variously developed, may 

 be absent, but Limb-girdles always present; terrestrial ; Anguis is viviparous ; 

 Amer., Eur., India. Gerrhonoius Wieg., 4 well-developed pentadactylo 

 limbs, W. and S. N.-Amer., C. Amer. ; Ophisaurus Daud. (Pseudopus 

 Merr.), limbs absent, or reduced to vestiges of the hind pair, S.E. Eur., 

 N. Air., S.W. Asia, S. N.-Amer., Mexico ; 0. apus Pall., the glass-snake, 

 Balkan Peninsula etc. Diploglossus Wieg., limbs pentadactyle, well 

 developed, trop. Amer. ; Sauresia Gr., limbs tetradactyle, W. Indies ; 

 Panulopus Cope, 4 limbs, anterior without digits, posterior with a rudi- 

 mentary digit on the inner border, W. Indies ; Ophiodes Wagl., no forelimbs 



