430 



MANUAL OF ZOOLOGY 



SECT. 



suckers by which the tadpole is able to attach itself to 

 water-weeds. Soon a pair of external gills appears, the 

 mouth and gill-slits are formed, and the eyes appear. The 

 mouth is small, bounded by lips beset with horny papillae, 



hatched 



FIG. 258. Rana temporaria. Stages in the life-history, from the newly-hatc 

 Tadpoles (/) to the young Frog (5). 2a is a magnified view of 2. (F 

 Mivart.) 



and provided with a pair of horny jaws. The enteric canal 

 grows to a great length and is coiled like a watch-spring, and 

 the tadpole browses upon the water-weeds which form its 



