Figs 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
CASTLE. — Ciona intestinalis, 
PLATE II. 
‚7-10. Four sections through an impregnated egg; magnification, 500 diam- 
eters, 
7. Fourth section of series, showing the male pronucleus and archoplasmic 
spheres. Compare Figs. 11 and 12. 
8. Seventh section of series, showing the female pronucleus. 
9, Tenth section of series, showing the female archoplasm. 
10. "Twelfth section of series, showing polar globules. 
11. Graphie reconstruction of the series on a plane, perpendicular to that of 
Fig. 7, indicated by the line ad, Fig. 7. 
12. A similar reconstruction on a perpendicular plane, the projection of 
which is the line a’ 0”, Fig. 7. 
