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VERTEBRATE ZOOLOGY 



and do not in any sense serve as propellers. Only short soaring leaps 

 from limb to limb or between adjacent trees can be accomplished. 



FIG. 139. Group of Lacertilia, II. A, Horned Toad, Phrynosoma cornutwn; 

 B, Gila monster, Heloderma horridum; C, Anguis fragilis (the Glass Snake or 

 Blind- Worm); D, Cape Monitor, Varanus albigularis; E, Galapagos Sea-Lizard, 

 Amblyrhynchus cristalvs; F, Moloch horridus. (All redrawn, A, after Gadow; 

 others after Lydekker.) 



When the animal is at rest the " wings" are folded against the sides. 

 The flying dragons are natives of Indo-Malayan countries. Not much 



