1897.] 



LIZARDS OP THE GENUS SCELOPORTTS. 



479 



Dorsal scales much larger than ventrals, as broad as long or a 

 little broader than long, moderately or strongly keeled, with more 

 or less distinctly denticulated posterior border, simply pointed or 

 more or less strongly mucronate; the keels oi: the dorsal scales 

 forming parallel longitudinal series ; 27 to 37 scales between the 

 interparietal shield and the base of the tail ; 5 to 7 scales, taken in 

 the middle oi: the back, correspond to the length of the shielded 

 part of the head. Lateral scales keeled, directed obliquely upwards 

 and backwards, as large as or a little smaller than the dorsals. 

 Ventral scales small, smooth, entire or bi- or tricuspid. 34 to 44 

 scales round the middle of the body. 



The adpressed hind limb reaches the shoulder, the cervical fold, 

 or the ear; tibia as long or nearly as long as the shielded part of 

 the head ; the distance between the base of the fifth toe and the 

 extremity of the fourth equals or slightly exceeds the distance 

 between the end of the snout and the ear. 9 to 20 femoral pores 

 on each side. 



Caudal scales about as large as dorsals, strongly mucronate. 

 Males with enlarged postanal scales. 



The following table shows the variations in the proportions and 

 in the scaling in the specimens examined : — 



A. A series of four or five transversely enlarged supraoculars 



(fig. 1, a). 



c? 



El Paso, Toxas. Forrer 



Guadalajara, Jalisco. Buller 

 Guanajuato. Duges 



j» ') 



Plateau of Mexico. Gecldes . 



Hacienda del Bobo. Hcege . 



R. Santiago, Jalisco. Sinitli. 

 II i» »» 



)i )» J) 



S. Mexico. Godman 



Mexico. Boucard 



»» >' 



„ De Moore 



? 



1. 



113 



61 



106 



97 



71 



89 



118 



103 



100 



84 



79 



70 



98 



130 



22 

 14 

 20 

 18 

 1.5 

 19 

 22 

 20 

 20 

 17 

 16 

 15 

 19 

 24 



3. 



2.5 

 15 

 22 

 20 

 16 

 21 

 25 

 24 

 23 

 20 

 19 

 16 

 21 

 28 



23 

 13 

 21 

 18 

 15 

 18 

 22 

 21 

 20 

 17 

 16 

 15 

 19 

 24 



5. 



26 

 16 

 23 

 20 

 18 

 22 

 24 

 24 

 22 

 20 

 20 

 17 

 21 

 27 



27 

 28 

 29 

 28 

 28 

 31 

 28 

 27 

 28 

 29 

 27 

 28 

 30 

 27 



7. 



6 



6 



5 



5 



6 



6 



64 



54 



H 



7 



6 



7 



5 



5 



8. 



36 

 39 

 38 

 38 

 40 

 42 

 36 

 40 

 36 

 40 

 38 

 40 

 40 

 36 



9. 



18-17 

 17-17 

 16-18 

 19-17 

 15-16 

 20-20 

 17-18 

 20-19 

 15-14 

 16-18 

 16-16 

 19-19 

 16-18 

 18-18 



B. Supraoculars intermediate between A and C (fig. 1, 6, c). 



32* 



