( 89 ) 



50. Of the eye, and its peculiarities 

 in this clafs of animals. 



Of the Marfupium nigrum, or 



Bourfe noire \ 



51. Of the organ of hearing in birds. 



52. Of the organs of generation in 

 the male. 



53. Of the organs of generation in 

 the female. 



Of the vitellarium, infundibulum, 

 &c. 



54. Of the phcenomena attending 

 the paflage of the egg to the ute- 

 rus. 



55. Stru&ure of an egg explained. 



56. Of the progreffive changes which 

 the egg undergoes during incuba- 

 tion. 



Of the nourifliment of the foetus 

 of oviparous animals. 



M 57. Of 



