214 LACERTILIA. 



(Kreuzotter). Common Viper, distinguished by the black-brown zigzag band 

 on the back. Found in the mountain forests of Europe. 



Fam. Crotalidae. With a pit between the eyes and nose. Crotalus dvrissui 

 TJ., Kattlesnake of south-east of North America; C. horndns L. South America. 

 Bothrops atrox L. Brazil. 



FIG. 64f).2Iydropkis Ucolor (rfc^ns FIG. Gil. Pygopus (Bipet) lepidopus (r&gne 



animal). animal). 



Order 2. SAURII * (LACERTILIA) LIZARDS. 



Plagiotrema with pectoral girdle and sternum, usually with tympanic 

 cavity and movable eyelids; with a non-extensible mouth and with 

 urinary bladder. 



The Lizards always have an elongated and sometimes a snake-like 

 body. As a rule there are four extremities, which, however, scarcely 



* Tiedemann, " Anatomic und Naturgeschichte der Drachen." Niirnberg, 1811. 

 J. E. Gray, " Catalogue of the specimens of Lizards in the Collection of the 

 British Museum." London, 1845. 



Fr. Leydig, " Die in Deutschland lebenden Arten der Saurier." Tubingen, 1872. 



