THE CLASSIFICATION OF BACTERIA 63 



f f Growth in depth of gelatin in stab cultures. 



Streptococcus Pyogenes Group. 

 § Species pathogenic to animals. 



22. Sir. pyogenes Rosenbach. 



23. Sir. enteritis var. Libmanni. (See No. 2.) 

 §§ Pathogenic to plants. 



24. Str. phytophthorns (Frank). 

 §§§ Non-pathogenic (?) milk species. 



25. Str. Grotenfeldtii. 



26. Str. proteus. 



fft Growth in gelatin stab cultures not described. Cultural 

 characters imperfectly known. 



27. Str. agalactia Adametz. 



28. Str. IVeisiiTrev. 



29. Str. equi Sand-Jensen. 



16. Str. pneumoniae (Weichselbautn) Gamaleia 



Microbe de la salive Pasteur : Acad. Med. Paris, 1881. 

 Pntumococcus Frankel; Verhandl. d. Ill Congress f. inn. Med., 1884. 

 Diflococcus pneumonia Weichselbaum : Centralblatt f. Bakteriologie, 1887, 588. 

 Bacillus salivarius-sepiicus Biondi : Zeitsch. f. Hygiene, II, 1887, 196. 

 Diplococcus lanceolatus-capsultaius-pneumonicus Fo^-Bord ; Zeitsch. f. Hygiene, IV, 



1888, Heft. 1. 

 Klebsiella salavaris Trevisan : Gen., 1889, 26. 

 Streptococcus lanceolatus Gamaleia: Ann. Inst. Pasteur, 1888, 440. 



Morphology. Cocci in twos or chains of 4-6 elements ; round-lenticular ; in 

 body with a capsule. Stain by Gram's method. 



Gelatin colonies. Deep colonies: macroscopically small, round, white or 

 gray ; microscopically round, entire, slightly granular. Surface colonies : 

 macroscopically round, gray, in 4 days 1-2 ram. ; microscopically round, 

 entire, finely granular. 



Agar colonies. Deep colonies: microscopically round-lenticular, entire, 

 opaque, grayish black, coarsely punctate. Surface colonies: macroscopi- 

 cally like gelatin colonies ; microscopically round, entire, translucent, 

 finely punctate. 



Glycerin agar slant. A feeble growth, small grayish colonies. 



Blood serum. Growth slimy, transparent. 



Bouillon. Faintly turbid. 



Milk. Coagulation variable. 



Litmus milk. Sometimes pink and coagulated. 



