33^ . CHORD AT A. 



CHAPTER XXL 

 CHORD ATA— (Continued.) 



IV.— RANA. 



Phylum - - - Chordata (p. 402). 

 Sub-Phylum - - Vertebrata (p. 405). 



Class - - - - Amphibia (p. 439). 



Fig. 239. — The Common Frog {Rana tempormHa). 

 (Natural Size.) 



1 



Note the large mouth, and tympanum behind the eye, long hind-limbs with webbed 

 toes and pigmented skin. 



Rana tempo raria is the common British frog of 

 universally familiar appearance. A slightly larger form, 

 Rana esculenta^ or the Edible Frog, common upon the 

 Continent, is often preferred for dissection, but the 

 description here given will suffice for either species. 



The frog is a water-loving terrestrial animal. In loco- 

 motion it is equally at home in water or on land. In the 

 early morning and early evening, when dew and damp are 

 frequent, it becomes active in the pursuit of insects, worms 



