JOURNAL OF MICROSCOPICAL SCIENCE. 



DESCRIPTION OF PLATE VIII, 



Illustrating Dr. J. B. Hicks' paper on the Diamorphosis of 

 Lyngbya, Scliizogonium, and Prasiola, and their connec- 

 tion with the so-called Palmellaceee. 



Pi". 

 1. — Lyngbya muralis giving off Gonidia. 



2. — Ditto, ditto, enlarged, containing vacuoles and bands of green proto- 

 plasm. 



3. — Ditto, ditto, with narrow curved cells, with homogeneous contents. 



4. — Gonidia of Lyngbya segmenting in various manners. Smallest cells 

 Y^uuth inch diameter, a reverting to linear growth. 



5-7. — Various stages of growth of Lyngbya. 



8. — Ditto, showing tendency to become moniliform. 



9. — Lyngbya proceeding to collateral segmentation. 



10. — Portion of a band of livugbya (scliizogonium) of four rows of cells. 



11. — The same, collateral subdivision having proceeded to form numerous 

 distinct rows. 



12. — The same, having formed a wavy frond of 1 to 3 inches diameter; 

 giving off segmenting Gonidia («,«,) the cell-contents of some {bM) 

 being fasciated. 



13. — Portion of same, showing subdivision of cells in multiples of the quar- 

 ternary forms. 



14. — Portion of a frond, the cells of M'hich are reverting to linear growth. 



15. — Ditto, highly magnified cells, with granulated contents. 



16. — Various forms of Lyngbya, whose separated gonidia are segmenting 

 linearly as in fig. 14. 



17.— Modifications of cell-growth in Lyngbya. 



