130 IMPORTANT VARIETIES OF FISSION-FUNGI. 



varieties which we are not acquainted with in detail are briefly referred 

 to in the connection where they belong. 



2. The colonies, slightly magnified, are described and drawn with 

 closed diaphragm, and so placed that the peripheral portions are sharply 

 visible. 



3. JFor the drawings and descriptions plates with a medium number 

 of colonies, 60 to 100, were always employed. Usually the smaller 

 colonies were selected. 



4. All statements, unless otherwise qualified, regarding the growth 

 upon gelatin apply at a temperature of 22°, upon agar at 37°. 



5. When nothing particular is said regarding the color and consist- 

 ency in the description of the agar streak culture, and of the surface 

 growth in the agar stab culture, they are the same as upon the agar 

 plate. 



6. Regarding the formation of pigment, odoriferous, gustative, 

 and other metabolic products nothing has been said unless special 

 investigations have been made upon the same. 



7. Our original purpose of treating exhaustively the resistance of 

 all important varieties to injurious influences has been abandoned as 

 being too far-reaching. This decision was also partially dependent 

 upon the fact that the statements of authors often deviate so widely. 

 Therefore we have restricted ourselves to making complete statements 

 regarding some varieties (Micr. pyogenes, Strept. pyogenes, Strept. 

 lanceolatus, Bac. anthracis, Bact. typhi, Corynebact. diphtherise, My- 

 cobact. tuberculosis, Vibrio cholerse). 



8. References to the illustrations in the atlas are always 

 given thus : Plates with Arabic numerals, figures with Eoman. 

 Thus, 5, VIII, signifies figure viii in Plate 5. 



The introductory remarks of the separate sections, coccaceae, bac- 

 teriaoese, spirillaceae, are also to be heeded. 



Statement of the Terms Employed by Us in the 

 Description of Cultures of Bacteria. 



I. Stab Chltubes. 

 A. Not liquefying. 



1. Stah canal : 



(a) Thread-like : Uniform growth vrithout anything especially 

 characteristic. 



(a) Smooth. 

 (/?) Rough. 



(i) Nodular : The stab canal is beset with larger or smaller tuber- 

 cles, points or teeth. 



(e) Hairy: The stab canal is beset with delicate longer or shorter un- 

 divided spurs, which are (a) parallel, {P) curled, (y) matted. 



id) Branched: The stab canal is beset with dividing outgrowths. 



(e) Beaded: The stab canal consists of small roundish or round con- 

 nected colonies. 



(/) Band-like: Grovpth as a small band, produced by making th? 

 stab canal vrith a loop. 



