KoFoiD. — Development of Limax. 



PLATE IV. 



All figures magnified 490 diameters. 



Figs. 27-30. Twenty-four-cell stage, composed of tlie following cells: a^-*-d^-^; 



a5.3_^5.3. aS-*-c?6-*; a6-3-c/«-3; a^-'^ -d'^-'^; a^-^-d^-'^. 

 Fig. 27. From the vegetative pole. 

 J'ig. 28. From the animal pole, showing vacuolation. 

 Fig. 29. View of tlie right posterior quadrant (c). Vacuolation of the animal 



pole. 

 Fig. 30. Optical section along vertical axis cutting the quadrants b and d. 

 Figs. 31, 32. Twenty-four-cell stage, similar to the egg shown in Figures 27-30. 



Division of the quartet 6.2. 

 Fig. 31. View of tlie anterior end. Spindle in b^'-. Polar globule present. 

 Fig. 32. Same egg from the vegetative pole. Spindles in 6^-2, c^-^^ rf6.2_ 



