256 LACERTIANS. 



and compressed transversely to the axis of the jaw ; the anterior ones 

 are simple, the posterior have a notch on their anterior margin near 

 their apex. There are two rows of four or five pretty strong conical 

 teeth, one on each pterygoid bone bordering the posterior nasal aper- 

 ture. 



In the Apor. ornata (Ameiva ornata, D'Orb.) there are four or five 

 strong teeth on each pterygoid bone. 



In the genus Cnemidophorus, of which the Ameiva murina, Cuv. is 

 the type, the intermaxillary teeth are generally ten in number, the 

 maxillaries vary from eighteen to twenty-two on each side, the pre- 

 mandibulars from twenty-two to thirty, the posterior being tricuspid, 

 the others simple and compressed ; the pterygoids are dentigerous. 



In an allied species of Ameiva the maxillary teeth, instead of being 

 compressed and tricuspid, are slightly flattened in the axis of the jaw, 

 and their summits are bifid : whence it has been proposed to separate 

 it generically under the name of Dicrodon. 



The maxillary teeth of the Acrantus have a similar form : their 

 large crown is excavated by a longitudinal furrow continued from 

 the interspace of the cusps : but the pterygoids support teeth, which 

 have not been found in Dicrodon. In the green Ameiva {Acrantus 

 viridis, d. & b., Tejus viridis, Merrem) the pterygoid teeth are 

 arranged two or three in number, on each side the posterior palatal 

 fissure : they are small, conical and straight. The teeth, in some 

 species of this genus, are finely dentated in the young individuals, 

 whence Wagler proposed the name of Ctenodon, supposing the cha- 

 racter to be peculiar to and permanent in them. 



The intermaxillary teeth are ten in number in the Teguixin (Grande 

 Sauvegarde d'Amerique, Cuv.) ; the maxillary teeth are thirteen or 

 fifteen on each side, and gradually increase in size as they are situated 

 further back in the jaw : the posterior teeth are tricuspid in young in- 

 dividuals and present the form of simple tubercles in the old. The 

 inferior maxillary teeth, fifteen to eighteen on each side, correspond 

 in size and form to those above. 



In the common or side-streaked Ameiva (Ameiva vulgaris, Lich- 

 tenstein) there are twelve intermaxillary teeth, slightly separated ; 

 eighteen to twenty-four maxillary teeth on each side ; and twenty to 



