Fig. 15. 
Fig. 16. 
Fig. 17. 
Fig. 18. 
Korom. — Development of Limax. 
Fig. 19. 
PLATE II. 
All figures magnified 490 diameters. 
Two-cell stage from animal pole. Spindles of the third generation pres- 
ent. No cleavage cavity. Deeper ends of the spindles (asters of B 
and D) shown by lighter lines. 
Four-cell stage from the animal pole. Second cleavage furrow almost 
completed. Cleavage cavity and lenticular spaces present. 
Four-cell stage from the animal pole. Cleavage cavity present. Spindles 
of the fourth generation. 
Same egg from the anterior end. 
Eight-cell stage from the animal pole, composed of the two quartets of 
the fourth generation, ati-d*! and at2-dt?, Third cleavage 
plane just completed. Astrocals present. 
