VEETEBRATA 



77 



Palatine and pterygoid foramina ; an epi- 



pterygoid ; tongue papillose ; 10 Amiielloidea. 



No palative nor pterygoid formina; no 



epipterygoid ; 11 Annulati. 



A group whichi does not enter any of the above super- 

 families is the Dolichosauria (1.) On account of ignorance 

 ■of its essential characters, its position cannot be definitely 

 fixed, but it differs from other Lacertilia in the large num- 

 ber of cervical vertebrae, which is more than nine, accord- 

 ing to Owen. Teeth pleurodont. 



The families of these superfamilies are the following : 



Dolichosauria ; Dolichosauriidee. 



Rhiptoglossa ; Chamseleonidse. 



Pachyglossa ; Agamidse, Iguanidae (Fig. 26.) 



Nydsauria ; Eublepharidse, Geckonidse. 



Uroplatoidea ; Uroplatidse. 



Thecaglossa ; Varan idse. 



Helodei^matoidea ; Helodermidse. 



Diploglossa ; Zonuridse, Pygopodidse, Anguidse, Xenosauri- 



dse. 

 Leptoglossa ; Xantusiidse, Teiidse, Lacertidse, Gerrhosauridae, 



Scincidae, Acontiidae, Anelytropidae. 

 Annielloidea ; Aniellidse. 

 Annulati ; Chirotidse, Amphisbaenidse, Trogonophidae. 



I'r 



Tinx,fi 



Fig. 26.— Skull of Iguana tubereulata Linn ; external side view, natural size. 



The recent forms of the Lacertilia are much more numer 

 ous than the known fossil forms. 



