PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



EXPLANATION OF PLATE XL 



Fig. 29. — Transparent view of a developing ovum of Fundulus forced from the ovary l>y pressing tlie 



abdomen of the living flsb. x 32. 

 Fig. 30. — A similar view of another ovum of the same species; the embryo viewed from below and 



anteriorly, instead of from above, as was the preceding, x 32. 



