CHAPTER V.
CLASSIFICATION.
The arrangement of living organisms in groups according to their resemblances and the adoption of fixed names is of the greatest advantage in their scientific study. For animal forms and for the higher plants this classification is gradually becoming standardized through the International Congress of Zoölogists and of Botanists respectively. Unfortunately, the naming of the bacteria has not as yet been taken up by the latter body, though announced as one of the subjects for the Congress of 1916 (postponed on account of the war). Hence there is at present no system which can be regarded as either fixed or official.
Fig. 49.—Illustrates the genus Streptococcus. Typical chains, no staphylococcus grouping, no sarcina grouping, no flagella.
Fig. 50.—Illustrates the genus Micrococcus. Diplococcus, tetrads short chains and staphylococcus; no sarcina, no flagella.
Fig. 51.—Illustrates the genus Sarcina. Sarcina grouping, no flagella.
