34 



THE SCHIZOMYCETES. 



by P- Lindner was 0.6-1.0 p. By way of contrast, mention may 

 be made of Clostridium butyricum, this bacillus measuring from 



FIG. 4. Illustrations of the manifold variety in size and form of different bacteria. 



Except A 4 and A 5 all the other illustrations are representations of equally magnified 

 bacteria from a single drop of putrescent blood. (After P. Baumgarten.) Mag. 950. 

 Those in A are all symmetrical cells, those in B are elongated. 



A. i. Cocci (micrococcus) of various sizes. 



2. Diplococci of various sizes. 



3. Streptococci of various sizes. 



4. Micrococcus tetragonus (from a pure culture). Mag. 950. 



5. Sarcina ventriculi. Mag. 700. 



6. Staphylococci. 



B. i, 2, 4. Separate long rods of various lengths and breadths. 

 3. Short rods, partly of biscuit form. 



5. Chains, composed of either short or long rods. 



6. Long threads. 



3 to 10 p in length, with a breadth of i ju,. The giants among the 

 bacteria are to be found in the sub-group of chromogenic bacteria, 

 e.g. the genera Chromatium and Ophidomonas, which have, there- 



