British Fisheries. 



- Germ 

 Micropyle'^ 

 Diaqi-Qm of Floundei- ovum 



St^ermatozoon of Flounder 



Flounder Embi-yo-3 hours 



Head 



He.ad 



Yolk- 



Blastodenn 



Flounder Embryo-3^day£ 



YolW'sac Ta'iT" IMoto chord 

 Flounder Embryo -4? days 



Head 



Heart 



Notoch 



Tall'^^ ^'''''^utjffefs vesicle 



Flounder Embryo-S^days 



Flounder Embryo shortly 

 before hatchinq 



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

 Spermatozoon magnihed _ > , , . , 



