NO. 3545 LIZARDS — PETERS 9 



48. Dorsal scales strongly keeled Cercosaura* 



Dorsal scales smooth or weakly keeled Anadia 



49. Dorsal scales considerably narrower than ventrals; in transverse rows (fig. 



5a) 50 



Dorsal scales in oblique rows, (fig. 5^) notably imbricate and keeled . . 56 



\ / 



\ 



Figure 5. — Dorsal scales: a, Alopoglossus festae; b, A. copii. 



50. Dorsal scales keeled or with the center of each scale distinctly raised along 



midline 51 



Dorsal scales smooth or weakly keeled 53 



51. Lateral and dorsal scales subequal in size; laterals hexagonal, flat .... 52 

 Lateral scales much smaller than dorsals, tubercular or granular . Prionodactyliis 



52. Ventral plates rounded posteriorly, overlapping next row; dorsal caudal 



scales sharply pointed, overlapping Arthrosaura 



Ventral plates square or truncate posteriorly, not overlapping next row; 

 caudal scales truncate, not overlapping, not pointed Ptychoglossus 



53. Lateral scales much smaller than dorsals 54 



Lateral scales and dorsal scales subequal, ventrals and dorsals not separated 



by zone of smaller scales Anadia 



54. Strong collar fold; male with femoral pores 55 



Slight or weak collar fold; male without femoral pores Ecpleopus 



55. Head only slightly larger than neck; 5-7 posterior pre-anals; few large flat 



temporals Euspondylus 



Head clearly larger than neck; less than 5 posterior pre-anals; many small 

 granular temporals Neusticurus 



56. Head scales with many longitudinal striations; interparietal longer than 



parietals Leposoma 



Head scales smooth, may have some striae or keels on the interparietal and 

 parietals; interparietal equal in length to parietals Alopoglossus 



57. Dorsum with more than two rows of scales 58 



Dorsum witli two greatly enlarged rows of scales Iphisa 



58. Rear limb rudimentary or absent 59 



Rear limb well developed, f)entadactyl Gymnophthalmus* 



59. An unpaired frontonasal separates nasals Bachia* 



Nasals forming a suture on dorsal midline of head Ophiognomon 



60. At least two internasals 61 



Internasal single Gymnophthalmus* 



219-943—67—2 



