46 



CELL STRUCTURES 



though sometimes spherical. A spore may be formed in the 

 middle of the organism without (Fig. 27) or with (Fig. 28) 



Fig. 25. — Spores showing polar 

 germination. The lighter part of the 

 two organisms just below A and B is 

 the developing bacterium. In the 

 original slide the spore was stained 

 red and the. developing bacterium a 

 faint blue. 



Fig. 26. — A spore showing equa- 

 torial germination. The spore in 

 the center of the field shows a rod 

 growing out of it laterally. In the 

 original slide the spore was stained 

 red and the developing bacterium 

 blue. 



the cell around it. If the diameter 

 ncreased, then the cell with the con- 

 spindle-shaped. Such a cell is termed 



Fig. 27. — Spores in the middle of 

 the rod without enlargement of the 

 rod. The lighter areas in the rods 

 are spores. 



Fig. 28. — Spores in the middle 

 of the rod with enlargement of the 

 rod around them. The lighter areas 

 in the rods are spores. 



a "chstridivm." Sometimes the spore develops in the end 

 of the cell either without (Fig. 29) or with enlarging it 



