DEVELOPMENT OF THE OYSTER. 



Explanation of Plate XLI. 



Figure 53. Section of a portion of the visceral mass of a female oyster, magnified 250 diameters; a, epithelium 

 of the surface of the body; b, layer of connective tissue; c, layer of wriulded cells, which are probably fat-cells, 

 from which all the fat has been removed ; /, sections of ten ovarian follicles ; e, the ovarian eggs. 



Figures 54 to 60. Abnormal or direct form of segmentation. 



