British Fisheries. 



Micropyie- 

 Diagram of Flounder ovum 



Spermatozoon of Flounder 



Flounder Embryo 3 hours 



Head 



Head 



Yo I k ' "^- "" B I asto d erm 



Flounder Embryo 3^: days 



Yo I k sac Ta'i I N otoch o rd 

 Flounder Embryo -4i days 



Tail' ""^Ku ^ffefs vesicle 



Flounder Embryo Sid ays 



Notoc 



Flounder Embryo shortly 

 before hatch ina 



Development of the Ovum of the Flounder. Ova all magnified 40 diameters 

 Spermatozoon magnified about 1,500 diameters. 



