352 CLASS REPTILIA. 



styliform vestige of hind limbs, S. Anier. ; Anguis L., teeth fang-hke, no 

 limbs, palate toothless, Eur., W. Asia, Algeria ; A. fragilis L., slow-worm, 

 blind-worm, eyes well developed with moveable lids, ear-opening minute, 

 tail as long as body, to more than ono ft. 



Fam. 10. Anniellidae. Vermiform, limbs absent, eyes and eai's con- 

 cealed ; tongue bifid ; teeth large, few, fang- like, skull ophidian-like, no 

 cokunella cranii, no squamosal, post-orbital arch ligamentous. Anniella 

 Cope, California. 



Fam. 11. Helodermatidae. Pleurodont, teeth fang-like and grooved 

 with labial poison-glands ; limbs well developed ; tongue bifid ; post- 

 fronto-squamosal arch absent ; osteoderms present. Heloderma Wieg., 

 the poisonous lizard (Gila monster), Mexico ; Lunthanotus Steind., Borneo 

 is ailed here. 



Fam. 12. Varanidae. Pleurodont, old-world lizards with a long, 

 bifid and protractile smooth tongue ; osteoderms absent ; postorbital 

 arch incomplete ; tail long ; teeth large, dilated at the base. Varanus 

 (Hydrosaurus) Merr., Monitor, with 30 species, Afr., S. Asia, Australia ; 

 in some species they attain to 7 feet. 



Fam. 13. Xantusiidae. Pleurodont with short tongue, and supra- 

 temporal fossa roofed by the cranial bones ; no osteoderms ; no moveable 

 eyelids ; C. Amer., and Cuba. Lepidophyma A. Dum., C. Amer. ; 

 Xantusia Baird, California ; Cricosaura G. and P., Cuba. 



Fam. 14. Teiidae. Dentition intermediate between pleurodont and 

 acrodont, teeth not hollow at the base ; tongue long and bifid, with scale- 

 like papillae ; palatines in contact anteriorly ; no osteoderms ; lirnbs 

 various, they may be normal, or shortened {Proctoporus), or more reduced 

 with incomplete number of digits (Scolecoscmrus), or digits absent and as 

 bud-like rudiments {Cophias, Ophiognomop, in one species of the latter the 

 pelvic limbs are absent) ; confined to the New World, 40 genera, more 

 than 100 species. 



Alopoglossus Blgr., Ecuador, Peru ; Ameiva Cuv., trop. Amer. ; Anadia 

 Gr., Costa Rica to Ecuador; Argalia Gr., Venezuela and Colombia; 

 Arthrosaura Blgr., Ecuador ; Cnllopistes Gravh., Peru, Chili ; Centropyx 

 Spi.v, S. Amer. ; Ce.rcosaura'^N'Agl., Brazil; CnemidophorusWagl., Amev. ; 

 Cophias Fitz., S. Amer. ; Crocodilnrus Spix, Gviianas, Brazil; Dicrodon D. 

 and B., Peru ; Dracaena Daud., Guianas and Amazon ; Ecpleopvs D. and 

 B., S. Amer. ; Euspondylus Tsch., Venezuela to Peru ; Gymnophthalnius 

 Merr., trop. Amer. ; Heterodactylus Spix, Brazil ; Iphisa Gr., Brazil, 

 Guianas ; Lepo.^oma Spix, S. Amer. ; Loxopholis Cope, Colombia ; 

 Micrablepharus Boettg., Brazil, Paraguay ; Monoplocus Gthr., trop. Amer. ; 

 Neusticurus D. and B., S. Amer. ; Ophiognomon Cope, Upper Amazons ; 

 Oreosanrus Ptrs., Colombia, Ecuador, Brazil ; Pantodactylus D. and B., 

 S.E. S. Amer. ; Perodactylus R. and L. Brazil ; Pholidobolus Ptrs., Ecua-. 

 dor; Placosoma Tsch., Brazil; Prionodactylus O'Sh., S. Amer.; Procto- 

 porus Tsch., Andes of Ecuador and Peru; Scolecosaurus Blgr., S. Amer. ; 

 Teius Merr., S.E. S.-Amer. ; Tupinambis Daud., teju, to 3 ft., S. Amer. ; 

 Tretioscincus Cope. Colombia, C. Amer. 



Fam. 15. Amphisbaenidae. Vermiform, teeth acrodont or pleurodont, 

 scales of body reduced, skin soft divided into squarish segments forming 

 regiilar annuli ; eyes and ears concealed ; limbs absent, except in Chirotes, 

 which has 4-clawed forelimbs ; girdles much reduced ; sternum absent 

 except in Chirotes in which it is not connected with the ribs ; tail short ; 

 skull without interorbital septum, epipterygoid, postorbital and fronto- 



