198 ■ ME. G. A. BOULENGER ON THE [Feb. 2, 



III. LIZAEDS. 



A. Head covered with granules or small scales above. 



1. No movable eyelids ; pupil vertical. 

 a. Digits not dilated. 



Ear-opening oval, slightly oblique, nearly vertical ; lower surface of thighs 



uniformly granulate 4. Gyninodactylus jellesmce. 



Ear-opening a horizontal cleft ; male with femoral pores, female with a series 

 of enlarged scales along the lower surface of the thighs. 



5. Gt/mnodactyhisfumosus. 

 h. Digits dilated. 



a. Digital expansion with two series of lamellie iuferiorly. 



Digits free, all clawed 6. Hemidactylus frenatus. 



Digits webbed, all clawed 7. Hemidactylus platyurus. 



Digits webbed at the base, inner rudimentary and clawless. 



8. Gehyra miitilata. 

 Digits with a rudiment of web, inner well developed but clawless. 



9. Lcpidodactylus lugvhris. 



/3. Digital expansion with single lamellce inferiorly. 

 Eostral shield not entering the nostril ; toes free. 1 0. Gecko verticillatus. 

 Bostral shield entering the nostril ; toes with a rudiment of web. 



11. Gecko monarchus. 



2. Movable eyelids ; pupil round. 



a. Wing-like lateral membranes, supported by the much-prolonged 



spurious ribs. 



a. No parietal foramen. 



Hind limb reaching slightly beyond the elbow of the adpressed fore limb ; 

 a continuous series of enlarged keeled scales along each side of the posterior 

 half of the body 12. Draco reUculatus. 



Hind limb reaching the axil or a little beyond ; enlarged lateral scales absent 

 or few and far between 13. Draco spilonotus. 



(i. Parietal foramen very distinct ; bind limb reaching the axil 

 or a little beyond 14. Draco heccarii. 



b. No wings. 



a. Body and tail compressed, crested. 



Crest feeble on back and tail 15. Calofes cristatellus. 



Caudal crest high, supported by the neural spines. 16. Lophura, amhoinensis. 



f3. Body depressed ; tail compressed, not crested. 



More than 80 transverse rows of ventral scales from gular fold to groin. 



17. Varanus salvator. 

 74 transverse rows of ventral scales from gular fold to groin. 



18. Varanus togianus. 



B. Upper surface of head with symmetrical shields. 



1. Two pairs of limbs. 



a. Tympanum distinct, more or less sunk ; fourth toe considerably 

 longer than third. 



a. Lower eyelid scaly, without central disk ; limbs overlapping when 

 adpressed. 

 * Dorsal scales pluricarinate ; supranasal present. 

 Dorsal scales tri- or quinquecarinate ; hind limb not reaching the axil. 



19. Mahuia midtij'asciata. 

 Dorsal scales very strongly tricarinate ; hind limb reaching the axil or beyond. 



20. Mabuia rudis. 



