DESCRIPTION OF SPKi IBS. 



565 



On agar a greyish growth ex- 

 tends over the surface, and later 

 prominent yellowish heaps make 

 their appearance. 



On potato there is an abundant 

 growth of a golden-yellow colour. 



They were found in sewage 

 mud. 



Spirillum choleras Asiaticae 



(P. 3in. 



Spirillum choleroides (Bu j wid). 

 Curved rods very similar mor- 

 phologically and in cultures to 

 Koch's comma-bacilli. 



They were isolated from river 

 water. 



Spirillum choleroides (Orlow- 

 ski). Curved rods very similar to 

 Koch's comma- bacilli. 



They were found in well water. 

 Spirillum concentricum 

 (Kitasato). Short spirilla, and 

 spirilliform filaments. 



Colonies are circular, and com- 

 posed of concentric rings alternately 

 opaque and transparent. 



Inoculated in the depth of gela- 

 tine there is only a little growth 

 in the track of the needle, and a 

 cloudy growth on the surface 

 extending into the jelly. 



On agar the growth is extremely 

 adherent. 



In broth they produce turbidity, 

 which disappears after a time ; and 

 there is a slimy deposit at the 

 bottom of the tube. 



They were found in putrefying 

 blood. 



Spirillum dentium (Miller).- 

 Spirals 10 to 20 /* in length, pomte< 

 at the ends. 



They have not been cultivated. 

 They occur in the deposit on tt 

 teeth, and in company with Lepto- 

 thrix buccalis in carious teeth. 



Spirillum flavescens (Weibel) 

 Commas thicker than those f oun< 

 in Asiatic cholera, spirilla, an< 

 spirilliform filaments. 

 Colonies yellowish. 

 Inoculated in the depth of gela 

 tine a finely granular 

 develops in the track of the need e 

 and on the free surface a pal 

 yellow patch. 



On agar the growth, at 



greyish- white, becomes yellow, and 

 forms a thick layer. 



On potato -the growth is abun- 

 dant, and similar in colour. 



They were fmnxl in sewage 

 mud. 



Spirillum ftavum 

 Spirilla morphologically idem 

 with spirillum aureum. 



Colonies on gelatine are pale- 

 yellow, and later the colour is more 

 intense. 



On agar and potato tin y forma 

 ayer the colour of yellow-* > 



They were isolated from sewage 

 mud. 



Spirillum leucomelaneum 

 (Koch). Dark un^'l ilike spaces 

 alternate in the spirillum, resulting 

 from a regular arrangement of 

 dark granular contents. A rare 

 :orm observed in water covering 

 rotting algae. 



Spirillum lingiise (Weibel). 

 Curved rods, spirilla, ami sj.inlli 

 form filaments, and involir 

 forms. 



Colonies are composed of mtei 

 lacing filaments, and offshoots 

 extend into the surrounding gela- 



Inoculated in the depth of gela- 

 tine a delicate growth occurs in the 

 needle track. 



On agar the growth is whiti-h 

 and granular. 



In broth a cloudiness is produced, 

 as well as a flocculent deposit. 



They are especially .listiu^uisbed 

 from other spirilla described 

 Weibel by their staining by C 

 method. 



They were isolated from 1 



^Spirillum marinum (Russell). 

 -Curved rods, and spiral filament*. 



Colonies circular, granular and 

 striated ; later, flocculent ma** 

 float in liquefied areas. 



Inoculatld in the depth of gela- 

 tine liM".-fa.-tion occurs I 

 track of the needle, and a mem- 

 brane form^on the surface of the 



ie growth is yellowish 



