DESCRIPTION OF SPECIES. 



569 



extremities, which are rounded o£f. 

 TUey possess dark granular con- 

 tents. Each thread has 2^ to 3^ 

 ■windings or spirals, -whose height is 

 9 to 13 /x. They have a flagellnm 

 at each end, and are sometimes 

 motile, sometimes not. 



They are found in the water of 

 marshes and in various infusions. 



Spiromonas Cohnii.— Colourless 

 cells, consisting of IJ spirals, with 

 both ends acutely pointed and pro- 

 vided with a flagellum. Breadth 

 of the cells, 1-2 to 4 fi. 



They occur in water containing 

 decomposing matter. 



Spiromonas volubilis (Perty). 

 — Colourless, transparent cells, 16 

 to 18 /I long. Rapidly motile, and 

 revolving round a longitudinal 

 axis. 



They occur in marsh-water and 

 putrefying infusions. 



Staphylococcus pyogenes alhus 

 (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 n 

 in diam., singly and in masses. 



Colonies white and opalescent, 

 producing Uquefactipn. 



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 i 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 

 vesicle^ of chicken-pox. 



Streptococcus acidi lactici 

 (Grotenfeld). — Oval cocci -5 to 1 /* 

 long, "3 to '6 ju 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. 



