SAPROPHYTICA 



1045 



tissues peculiar grains (sclerotia) of various size, shape, colour, and 

 consistency. Some species are facultative aerobes, others strictly 

 anaerobic. All are Gram-positive, and several acid-fast. In cultures 

 the mycelium very often undergoes fragmentation, and only bacil- 

 lary and coccus-like bodies may be seen. 



Classification.- — The very large number of species in this genus 

 can be classified as follows :— 



A. Habitat, soil; can be found in air or water — Section i, 



Saprophytica Foulerton, 1910. 



B. Habitat, plants or animals — Section 2, Parasitica Foulerton, 



1910. 



C . Habitat, soils, plants, or animals, but imperfectly described 



— Section 3, IncertcB sedis. 



Section 1: Saprophytica Foulerton, 1910. 

 This section can be divided into subsections as follows : — 



Subsection i : Majora. 



1. Grow freely under artificial condi- 



tions at 22° C, and generally at 

 37° C, with a few exceptions. 



2. Growth usually large and spread- 



ing. 



3. Development of aerial hyphse 



marked by a bright chalky 

 efflorescence. 



4. Earthy or mouldy smell often 



present in the cultures. 



5. Generally peptonize gelatine and 



blood serum. 



6. Diastatic action often present. 



7. Hyphal filaments usually coarser, 



and branching more marked 

 than in next series. 



Subsection 2: Minora. 



1. Grow moderately under artificial 



conditions at 22° C. and 37° C. 



2. Growth usually moderate and 



circumscribed. 



3. Development of aerial hyphse 



marked by a dull dry powdery 

 appearance. 



4. Earthy or mouldy smell either 



faint or absent. 



5. Rarely peptonize gelatine and 



blood serum. 



6. Diastatic action usually absent. 



7. Hyphal filaments usually finer, and 



branching rarer than in the 

 preceding series. 



Saprophytica Subsection Majora. 

 This subsection contains the following species : — 



1. Nocardia saprophytica (Foulerton, 1902):- — 



Streptothrix leucea saprophytica Foulerton, 1902. 



2. Nocardia dichotoma (Mace, 1888):— 



Cladothrix dichotoma Mace, 1888, nec Cohn, 1875. 

 Streptothrix chromogena Gasperini, 1890. 

 Streptothrix nigra Rossi-Doria, 1890. 

 Oospora metschnikovi Sauvageau and Radais, 1892. 

 Cladothrix hrauner Hesse, 1892. 



Cladothrix odorifer Rullman, 1895, nec C. odorifer RuU- 



man, 1898, parasitic in man. 

 Streptothrix melanotica Price- J ones, 1900. 

 Streptothrix humifica Beijernick, 1900. 

 Streptothrix nigrescens Foulerton, 1902. 



