DESCRIPTION OF SPECIES. 



569 



extremities, which are rounded off. 

 They possess dark granular con- 

 tents. Each thread has 2 to 3 

 windings or spirals, whose height is 

 1 to 13 p. They have a flagellum 

 at each end, and are sometimes 

 motile, sometimes not. 



They are found in the water of 

 marshes and in various infusions. 



Spirompnas Cohnii. Colourless 

 cells, consisting of 1^ spirals, with 

 both ends acutely pointed and pro- 

 vided with a flagellum. Breadth 

 of the cells, 1-2 to 4 /u. 



They occur in water containing 

 decomposing matter. 



Spiromonas volubilis (Perty). 

 Colourless, transparent cells, 15 

 to 18 p long. Rapidly motile, and 

 revolving round a longitudinal 

 axis. 



They occur in marsh-water and 

 putrefying infusions. 



Staphylococcus pyogenes albus 

 (p. 178). 



Staphylococcus pyogenes 

 aureus (p. 176). 



Staphylococcus pyogenes cit- 

 reus (p. 178). 



Staphylococcus pyosepticus 

 (Heucourt and Richet). Cocci 

 identical with Staphylococcus pyo- 

 genes aureus. 



Subcutaneous injection causes in 

 rabbits intense oedema, and death 

 in twenty-four hours. 



They were isolated from pus 

 from an abscess in a dog. 



Staphylococcus salivarius pyo- 

 genes (Biondi). Cocci '3 to -5 /* 

 in diam., singly and in masses. 



Colonies white and opalescent, 

 producing liquefaction. 



Inoculated in the depth of gela- 

 tine the growth appears in the 

 track of the needle, and is followed 

 by liquefaction. 



On agar the growth is orange- 

 yellow. 



The cocci produce local suppura- 

 tion when inoculated in animals. 



They were isolated from an 

 abscess in a guinea-pig following 

 subcutaneous injection of saliva. 



This coccus is probably identical 

 with Staphylococcus pyogenes 

 aureus. 



Staphylococcus viridis flaves- 

 cens (Guttmann). Cocci singly, in 

 pairs and masses ; morphologically 

 agreeing with Staphylococcus pyo- 

 genes aureus. 



Colonies are greenish-yellow. 



Inoculated in the depth of gela- 

 tine a filament forms composed of 

 greyish colonies. 



On agar the growth is greenish- 

 yellow. 



They grow well on potato. 



They were isolated from the 

 vesicles of chicken-pox. 



Streptococcus acidi lactici 

 (Grotenfeld). Oval cocci -5 to 1 /n 

 long, '3 to '6 //, in width, and long 

 chains. They are partially anaerobic. 



Colonies are circular and white. 



Inoculated in the depth of gela- 

 tine a growth occurs only in the 

 track of the needle. 



Milk is coagulated. 



They were isolated from coagu- 

 lated milk. 



Streptococcus albus (Tils). 

 Cocci forming motile chains. 



Colonies are flat and circular, 

 with white periphery and dark 

 nucleus, rapidly liquefying. 



Inoculated in the depth of gela- 

 tine there is rapid liquefaction in 

 the track of the needle, and a 

 white deposit. 



On potato they form a white 

 slimy layer. 



They were found in water. 



Streptococcus bombycis (p. 472). 



Streptococcus brevis (Lingels- 

 heim). Cocci singly, in pairs 

 and chains, of eight to ten 

 elements. 



Colonies on gelatine are circular 

 and very minute. 



Inoculated in the depth of gela- 

 tine there is a funnel-shaped cavity 

 near the surface, and below this, 

 in the track of the needle, small 

 isolated colonies. 



On agar a yellowish-grey film 

 develops along the line of inocula- 

 tion. 



On potato there is a copious white 

 growth in forty-eight hours. 



Broth is made turbid. 



They were isolated from healthy 

 saliva. 



