c< )Mi-:nts 



CHAPTER Vril 



IWt.K 



chakactekn of the phylum vertebrata — AMi'Hinxrs 403 



PRACTICAI, DIRECTIONS 4IO 



CHAPTER IX 



CHARA^'TERS Ol' THE I/I, ASS PISCES — THE HOI^'TSH 414 



rRACTICAI. DIREClTONs . . 455 



CHAPTER X 



CHARACTERS OF THE CLASS MAMMALIA — THE RARBIT . 466 



PRACTICAL DIRECTICc\s 



CHAPTER XI 



THE MINCTE STRUCTURE OF CELLS — CELL DIVISION — OOGENE- 

 SIS AND SPERMATOGENESIS — MATURATION AND FERTILI- 

 ZAI ION iiF THE OVUM — EFFECP OF FOOD-YOLK ON DK- 

 \ELOPMENT — I-OKMATIOX OF THE CHIEF ORGANS OF THE 

 ADULT IN VERTEBRATES, AND OF THE AMNION, ALLANTOIs 



AND PLACENTA 



PRACITCM. DIRECTpiNs 



525 



Index . 



541 

 5S5 



5^9 



