132 A TEXT-BOOK OF BOTANY 
Reproduction is by cell-division, as among the blue- 
green Algze (§ 58-60), a group which the bacteria resemble 
«7 
Fic. 121.—A group of bacteria of various kinds, mostly ciliated; F is the bac- 
terium of typhoid fever, and H that of cholera—After ENGLER and PRANTL. 
in many ways. This cell-division is remarkably rapid in 
bacteria, resulting in such a prodigious multiplication of in- 
