Explanation of PI. 11. 



Sporeling-development of Saninssnui, Ilonieri. All Figures were 

 drawn with tlic aid of camera lucida from living materials. Magni- 

 fications : liigs. 1-lGa ca. 140 times; figs. 17-20 ca. 50 times; fig. 

 l()b ca. 500 times. 



Fig. 1. Oogouinin with eight nuclei, chromatophores grouped 

 around the nuclei. 



Fief. 2. First segmentation. 



Fief. 3. Second segmentation, forming the rhizoid cell at one 

 •end. 



Fief. 4. Beginning of the third segmentation. 



Fiö. 5- Completion of the third segmentation. 



Fig. 6, a. Side view at the hegimiing of the 4th -iegmeatation. 



Fief. 6, b. Tolar view of the same. 



Fig. 7- First segmentation of the rhizoid cell. 



Fig. 8. Second segmentation of the same. 



Fig. 9. lîhizoid cell in the eight-celled stage. 



Fig. 10. Further segmentation of body cells. Khizoid cell 

 Temains in the eight-celled stage, a, side view ; b, polar view. 



Fiö". 11. Beginning of rhizoid-formation. 



Fig. 12. Khizoids somewhat elongated. 



Figs. 13-16 a. Further development of rhizoids. 



Fig. 16 b. '-f he terminal portion of a rhizoid. 



Figs. 17-20. Development of the body of a sporeling. 



