'561 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
/3. Schizomycetes. 
*_ 
New System of Classifying Bacteria.* — Herr W. Migula suggests 
fhe followiug classification into Families and Genera. 
I. Fam. OoccACEiE Zopf. (Mig.). Cells spherical; dividing in one, 
two, or three dimensions of space ; endospore formation rare. 
Cells dividing in one direction .. .. ]. Streptococcus Zopf. 
2. Micrococcus Cohn. 
3. Sarcina Goods. 
4. Planococcus g. n. 
5. Planosarcina g. n. 
F { Cells dividing in two directions 
absent J Q e ^ s dividing i n three directions 
Flagella j Cells dividing in two directions . 
present \ Cells dividing in three directions . , 
II. Fam. Bacteriace^j Zopf. (Mig.). Cells straight, cylindrical, 
length variable ; never bent. Dividing in one direction only. 
W \ 6- Bacterium Cohn. 
absent f 
J Distributed over the whole body .. .. 7. Bacillus Cohn. 
1 Polar 8. Pseudomonas g. n. 
one or more 
spiral 
Flagella 
present 
III. Fam. Spirillace.® (Mig.). Cells with 
turns, dividing in one direction only. 
1 Flagella absent 9. Spirosoma g. n.' 
Polar flagella 1, rarely 2-3 10. Microspira Schroet. 
(Mig.) 
5-20 flagella in polar bundles .. .. 11. Spirillum Ehrenbg. 
Cells { Organs of motion unknown, but (?) 12. Spirochsete Ehrenbg. 
flexible, < undulating membrane, 
serpentine ( 
IV. Fam. Chlamydobacteriace.® fam. n. Forms with very different 
kinds of development, but all characterised by a firm invest- 
ment or sheath which surrounds the cells joined into branched 
or unbranched filaments. 
/ 
F Cells 
without 
sulphur 
granules 
Cells 
divide 
in one 
direc- 
tion 
only 
Filaments unbranched 
Pseudodichotomous branch- 
ing ; vegetative propagation 
by polar-flagellated swarm- 
cells. 
Cells with 
sulphur 
granules. 
V. Fam. 
Cells at first dividing in one 
direction only, but after- 
wards in three ; the division 
Cells products round themselves 
divide off and become reproductive 
in all cells. 
three Filaments, at first unbranched, 
direc- presenting a bond of union 
tions between the cells. Certain 
cells may grow through the 
investment, thus eausiug 
branching. 
Filaments unbranched. Dividing in 
one direction. 
13. Streptothrix Cohn. 
14. Cladothrix Cohn, 
including 
Sphserotilus 
and 
Actinomyces. 
15. Crenotlirix Cohn. 
16. Phragmidiothrix Engl. 
17. Thiothrix Winogr. 
Beggiatoace^e. Sheathless filaments. Division in one 
direction ; movement by means of undulating membrane. Cells 
with sulphur granules. 18. Beggiatoa Trev. 
* Arb. Bact. Inst. Grossherz. Hochschule zu Karlsruhe, 1895, pt. ii. See 
Centralbl. f. Bakteriol, u. Parasitenk., 2 te Abt., 1895, p. 406. 
