16 IGUANIDE. 
The adpressed hind limb reaches the end of 
CHE -SNOUG accin ga hs ba os SEW Eee we 32. aureolus, p. 49. 
tt Tibia considerably shorter than the distance 
between tho end of the snout and the ear- 
opening. 
Occipital scarcely larger than the ear-opening, 
separated from the supraorbitals by two 
series of scales. oc giascewses ewe a eens 42. baceatus, p. 54, 
Occipital considerably larger than the ear- 
opening, separated from the supraorbitals 
by three or four series of scales ........ 43. guentheri, p. 54. 
*#* Scales on upper surface of snout smooth. 
+ Occipital larger than the ear-opening. 
+ Canthus rostralis weak; snout not produced. 
Supraorbital semicircles separated by two or 
three rows of scales; the adpressed hind 
limb reaches the front of the orbit ...... 36. bocourti2, p. 50. 
Supraorbital semicircles in contact or sepa- 
rated by one row of scales; the adpressed 
hind limb does not reach the eye ........ 37. ortonii, p. 51. 
tx Canthus rostralis sharp; end of snout truncate 
in the female, compressed and produced in the 
male. 
Ventral scales smooth ...............00- 47, punctatus, p. 57. 
Ventral scales keeled.............. 00.04. 48. boulengeri, p. 58, 
Tr Occipital not larger than the ear-opening. 
Supraorbital semicircles in contact ........ 50. buckleyi, p. 58. 
b. Occipital in contact with supraorbitals. 
Supraorbital semicircles in contact ........ 49. transversalis,p.58. 
B. Occipital very small or quite indistinct, at any rate smaller 
than the ear-opening. 
a. Tibia as long or nearly as long as the distance between 
the end of the snout and the ear-opening. 
a. Median dorsal scales keeled. 
* Head (to occiput) a little longer than the tibia. 
Tt Caudal scales subequal. 
16 to 18 lamellw under phalanges 1. and m. 
of the fourth toe; ventral scales smooth or 
indistinctly keeled... 4 any eee ney ox ex 38. schiedii, p. 52, 
13 or 14 lamelle under phalanges mu. and 
mr.; ventrals keeled.................. 40, tropidolepis,p. 53. 
