SPIRILLA 409 



SPIEILLUM AMYLIFERUM (Van Tieghem) 



Where Found. In water. 



Microscopic Appearance. Kigid filaments rolled up towards the right, 6 /* 

 long and from 1 to 1-5 n broad, with from 2 to 4 spiral turns. It multiplies by 

 division and spores. In the absence of air it acts as a vigorous ferment. 



SPIEILLUM PLICATILE (Ehrenberg) 



Authority. Koch, Co/m's Beitrage zur Biologic d. Pflanzen, vol. ii. 



"Where Found. In stagnant waters, especially those containing living or 

 dead plants, or decomposing organic matter. 



Microscopic Appearance. Very thin filaments with narrow spiral twists, 

 reaching sometimes 100 to 200 /* in length, and 0-5 /t broad, with rounded ends. 

 It is very motile. 



SPIRILLUM EUFUM 



Authority. Perty, Zur Kenntniss Meinster Lebensformen. Berne, 1852. 



"Where Found. In well-water. It forms on the surface of the sides of the 

 well red mucous spots varying in colour from rose-red to blood-red. (Eoux, 

 loc. cit.) 



Microscopic Appearance. Forms filaments from 8 to 16 //. long, slightly 

 reddish, with 1^ to 4 spiral turns. It is very motile. It is not broken up 

 into segments. 



SPIEILLUM SEEPENS (Miffler) 



"Where Found. In stagnant water and putrefying liquids. 



Microscopic Appearance. Thin filaments, often joined together in chains 

 from 11 to 28 ju long and from 0-8 to 1 M broad, with 3 to 4 flattened spiral 

 turns. It is very motile. Sometimes it occurs in superficial flakes or pellicles, 

 in which it is bound together by mucous matter. 



SPIEILLUM TENUE (Ehrenberg) 



Where Found. In stagnant water. 



Microscopic Appearance. Filaments from 4 to 15 AI in length, and about 

 0'4 ju. broad, having 1 to 5 spiral turns very far apart. It is very motile. 



SPIEILLUM UNDULA (Miiller) 



Where Found. Frequent in stagnant putrid water. 



Microscopic Appearance. Filaments 8 to 16 p in length, and about 1 to 1-5 M 

 broad, having 1 to 6 spiral turns. It is very motile, and has cilia. Forms 

 frequently coarse, mucous flakes. 



