PLATE 2 
Coccoid cells. 
Fig. 13.—Gonidia budding. Azotobacter chroococcum (No. 24). Mannite-nitrate 
solution, 1 day. 
Fig. 14.—Gonidia growing to regenerative bodies. A . chroococcum (No. 18). Potato 
agar, 1 week. 
Fig. 15.—Small regenerative bodies growing from large pale cells. A. chroococcum 
(No. 10). Mannite-nitrate agar, 6 days. 
Fig. 16.—Regenerative bodies multiplying by budding and fission. A. chroococcum 
(No. 25). Mannite-nitrate solution, 2 days. 
Fig. 17.—Typical coccoid growth. A. Beijerinckii (No. 6). Potato agar, 3 weeks. 
Fig. 18.—Coccoid cells of small size. A. chroococcum (No. 10). Mannite-nitrate 
agar, 4 weeks. 
Fig. 19.—Upgrowth from small to large coccoid cells. A. chroococcum (No. 19). 
Beef agar, 10 days. 
Fig. 20.—Regeneration of large cells. A. agile (No. 7). Milk, 4 weeks. 
Fig. 21.—Coccoids and sclerotia from symplasm. Bacillus Freudenreichii (No. 62). 
Beef agar, 1 week. 
Fig. 22.—Coccoids reproducing small rods. A. Beijerinckii (No. 15). Potato agar, 
5 weeks. 
Fig. 23.—Coccoids reproducing small sporulating rods. A. chroococcum (No. 19). 
Mannite-nitrate solution, 5 days. 
Fig. 24.—Coccoids reproducing cells of different size and shape. A. chroococcum 
(No. 25). Potato, 4 days. 
