ZOOLOGY I'XW MEDICAL STUDENTS 



CHAP. 



Fig. 97, C), fitted for active movement and provided with 

 and other appendages, 

 /.ion of the details of internal structure of the insect shows 



fe 



FIG. 97. 



.!...# nuttrrfly (I'ifris). (From Grah.iin Krrr's I 'rimer of Zoology.) A, Larva 

 '< cir adult. A, antenna ; abd, abdomen ; c, radiate eye ; 

 : aa; 1 h, tlmmx ; W, wing. 



that ii undergo quite as profound an alteration during 



as does the external form. 



It would appear to he a common feature of all animals except the 

 t that there is constantly taking place during the period of active 



