20 IGTTANID^. 



** Dorsal scales granular, smooth, very small. 



Head very short 106. obtusirostris, 



[p. 95. 

 2. Tibia at least as long as the distance between the end of 

 the snout and the ear. 



a. Dorsal scales keeled. 



a. The third phalanx of the fourth toe distinctly wider 

 than the basal. 



* Ventral scales smooth or indistinctly keeled. 



Supraorbital semicircles separated by one row 



of scales of nearly equal size 72. cymbops, p. 73. 



** Ventral scales keeled, 



t Scales of the supraorbital semicircles in contact 

 medially or separated by one row of very 

 small scales. 



Scales on the forehead not keeled ; tail with [p. 77. 



a dorsal series of enlarged scales 79. palpebrosvs. 



Scales on the forehead keeled 95. lemurinus, p. 86. 



ft Scales of the supraorbital semicircles separated 

 by one to four series of scales. 



J Occipital as large as or larger than the ear- 

 opening. 



Dorsal scales much larger than laterals, smaller 



than ventrals ; supraorbital semicircles 



separated from each other by one or two 



series of scales, and from the occipital by 



two or three series ; 13 or 14 lamellae under 



phalanges II. and III. of the fourth toe . . 84. ciqyreus, p. 80. 

 Dorsal scales very small ; supraorbital semi- 

 circles separated from each other by two to 



four series of scales, and from the occii)ital 



by three to five series ; 13 or 14 lamellos. . 93. godmani, p. 85. 

 Scales of the three or four median dorsal [p. 87. 



series nearly as large as the ventrals .... 96. tracJujdenna, 

 Dorsal scales very small; 17 or 18 lamella 98. bijyorcatus, jt. 88. 



tX Occipital smaller than the ear-opening. 



Occipital minute or wanting 91. pcecilopiis, p. 84. 



Occipital enlarged, little smaller than the ear- 

 opening 97. stigmosus, p. 87. 



/3. The three basal phalanges of the fourth toe of 

 nearly equal width. 



* Head nearly twice as long as broad. 



Eleven longitudinal series of large dorsal scales 69. bitectus, p. 71. 



