i6 5 



frontals small and separated; frontal broader 



than supraocular region 6. Lygosoma p. 212. 



B. Lower eyelid with a transparent disk; limbs well 

 developed. 



I. No supranasals; tympanum distinct; enlarged 



nuchals present 7. Liolepisma p. 227. 



II. Supranasals present; tympanum distinct; prae- 



anals not or slightly enlarged 8. Emoa p. 245. 



C. Lower eyelid scaly or with a transparent disk; 

 limbs short. 



a. Ear distinct; supranasals present 9. Riopa p. 262. 



b. Ear-opening minute or covered; no supranasals . 10. Siaphos p. 269. 



Section Otosaurus Gray. 



Lower eyelid scaly ; ear-opening very large, without lobules ; 

 supranasals present, large. Frontal not broader than supraocular 

 region ; frontoparietal and interparietal distinct. Praeanals 

 enlarged. Limbs strong, pentadactyle. 



Key to the Indo-Australian species. 



A. 40 44 smooth scales round the body ; 6 supraoculars ; 

 hind limb does not reach the shoulder ; 1 7 20 lamellae 



under the fourth toe i. L. celebense p. 165. 



B. 46 50 smooth scales round the body ; 8 supraoculars ; 

 hind limb reaches the shoulder or farther; 22 24 



lamellae under the fourth toe 2. L. cumingi p. 1 66. 



I. Lygosoma celebense F. Miiller. 



Lygosoma celebense, F. Muller, Verh. Naturf. Ges. Basel X 1894, p. 836. 

 Lygosoma celebense, Boulenger, Proc. Zool. Soc. London 1897, p. 212, pi. XI, fig. I. 



Snout short; lower eyelid scaly; ear-opening large, smaller 

 than the eye-opening, tympanum moderately sunk, no auricular 

 lobules. Nostril in the nasal; two pair of superposed loreals; 

 supranasal large, in contact with its fellow or separated by 

 the frontonasal, which is small, more long than broad, forming a 

 suture with the frontal; latter slightly shorter than parietals 

 and frontoparietals together, in contact with the three anterior 

 supraoculars; six supraoculars, first twice as long as second; 

 ii 13 supraciliaries; frontoparietals and interparietal distinct; 

 parietals forming a suture behind the interparietal; no nuchals; 

 fourth and fifth labials below the eye. 40 44 smooth scales 



