1 8 BACTERIOLOGY. 



tion, as Hansen I has observed to be the case 

 with the acetic acid bacteria, and Hueppe with 



A. B. 



C. 



Fig. 7. A. Sarcince from the stomach (after DeBary), fresh, un- 

 stained. Drawings magnified i : 600. 



B. Sarcina minnta (De Bary). i, cocci, 2, division into diplo- 

 cocci, 3, single-layered tetrads or merista forms, 4 and 5, forma- 

 tion of packets. 



C. Sarcince from the lung, double-stained preparation show- 

 ing endospores ; the dark portions are the (red) spores either 

 in the (blue) cells or isolated. 



A 



Fig. 8. Ascococcus (after F. Cohn), enlarged 65 times, showing, 

 inside the gelatinous colony, segmentation into small (a) and 

 large (b) spherical colonies of cocci which appear to lie in cham- 

 bers. B, The Clathrocystis form of Beggiatoa rosco-persicina 

 (after Zopf) ; the large chromatia (monads of earlier authors) 

 just visible ; magnified i : 250. 



the bacteria which produce propionic acid. In 

 the latter instance these irregular forms appear 



!Ber. d. Deutsch Bot. Ges., 1893. 



