JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE I, 
Illustrating Dr. Ransom’s paper on the Structure and Growth 
of the Ovarian Ovum in Gasterosteus leiurus. 
Fig 
1.—Free germinal vesicles, its spots unchanged by the medium in which 
it is examined. 
2.—a. Free germinal vesicle, of which the spots are changed by the action 
of water. 
6. A similar vesicle, of which the wall is raised at one part, showing 
the colloid mass. 
3.—Free germinal spots acted on by water. Examined by a higher power. 
a. Vacuoles. 
4.—a, a, Germinal spots fusing together in a5 p. ce. solution of chloride of 
sodium. 
b. Large pale drop, the result of such fusion. 
c. Vacuoles. 
5. Diagram to illustrate the structure of the yelk-sac. 
a. Button-shaped villus. 
b. Dotted outer surface. 
ec. Cut edge. 
