Koroıp, — Development of Limax. 
PLATE I. 
Figures 1 to 7 drawn from the same living egg. X 275. 
Fig. 1. Two-cell stage, beginning of flattened condition, 11.52 A. m. 
Fig.2. Same egg at 12.45 r. m. First trace of cleavage cavity. 
Fig. 3. Same egg at 12.50 P. m. 
Fig.4. Same egg at 1.01 P. m. 
Fig.5. Same egg at 1.20 P. m. Maximum size of cleavage cavity. 
Fig. 6. First (partial) expulsion of contents of cleavage cavity. 1.90 P. m. 
Fig. 7. Same egg at 1.55 p. m. Spindles of the third generation present; the 
asters of the near ends of the spindles in focus. 
Figures 8 to 13 drawn from another living egg of the same laying as 
Figures 1to 7. X 275. 
Fig. 8. At 3.45 r. m. Division into four cells completed. Typical alternate 
arrangement of the four blastomeres. Viewed in the direction of the 
second plane of cleavage, therefore perpendicular to the direction of 
Figures 1 to 7. 
Fig. 9. Same egg at 3.55 P. m. Formation of a cleavage cavity. 
Fig. 10. Same egg at 4.05 P. m. 
Fig. 11. Maximum development of the cleavage cavity. 4.95 P. M 
Fig. 12. Same egg after a gradual total expulsion of the contents of the cavity. 
4.45 p.m. Spindles of the fourth generation present. 
Fig. 13. Formation of the eight cells of the fourth generation. Persistence of the 
cleavage cavity. 5.45 P. M. 
Fig. 14. Lateral view of two-cell stage. First cleavage plane just completed. 
Astrocels present. X 490. 
