438 KING. [Vor. XTX. 
92. Witt, L. Ueber die Entstehung des Dotters und der Epithelzellen 
bei den Amphibien und Insecten. Zool. Anz., Bd. VII, 1884. 
93. Wrytwarter, Hans von. Recherches sur l’ovogénése et lorgano- 
génése de l’ovaire des Mammiferes (Lapin et Homme). Arch. 
de Biol., t. XVII, 1901. 
94. ————. Nachtrag zu meiner Arbeit ttber Oogenese der Saugetiere. 
Anat. Anz., Bd. XXI, 1902. 
9s. Woops, F. A. Origin and Migration of the Germ-Cells in Acanthias. 
Amer. Journ. Anat., Vol. I, 1902. 
EXPLANATION OF PLATES. 
All figures were drawn with the aid of a camera lucida. They have 
been reduced one-third. 
Abbreviations used in lettering the figures: 
Al., alimentary tract. 
Ao., aorta. 
C., centrosome. 
C. V., cardinal vein. 
E., endoderm. 
G., germ-cells. 
H., heart. 
L., liver. 
L. M., lateral plates of mesoderm. 
M., mesoderm. 
N., neural tube. 
No., notochord. ° 
Nu., nucleolus. 
P., early prophase of mitosis. 
T., Wolffian tubule. 
V., vitelline body. 
2 
