THE FUNGI aTt 
and industries. They are grouped under the first 3 families, viz., 
Coccacea, Bacteriacee and Spirillacea. 
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Fic. 276.—Types of spirilla. (After Williams.) 
Famity I.—Coccace#.—Cells in their free condition 
globular, becoming but slightly elongated before division. 
Cell-division in one, two or three 
directions of space. | 
A. Cells without Flagella. 
1. Division only in one direc- 
tion of space forming an aggrega- 
tion resembling a chain of beads 
—Streptococcus. 
2. Division in two directions 
of space forming an aggregation 
resembling a cluster of grapes— 
Staphylococcus. 
3. Division in three direc- 
tions of space forming a package- 
shaped or cubical aggregation— 
Sarcina. 3 
B. Cells with Flagella. 
1. Division in two directions 
of space—Planococcus. 
2. Division in three direc- 
tions of space—Planosarcina. 
Famity II.—BACTERIACE. 
Cells longer than broad, gen- 
erally two to six times, straight 
or only with an angular bend, 
never curved or spiral, division 
only at right angles to axis or rod; 
endospores. 
Fic. 277.—Crenothrix polyspora, an 
iron bacterium, which oxidizes iron 
causing a deposit of iron hydroxide to 
accumulate in water pipes where it may 
cause trouble. (After Migula from 
Schmidt and Weiss and Marshall.) 
with or without flagella and 
