90 MORPHOLOGY OF THE BACTERIA. 



into two, sometimes three to four articles, identical 

 with the B. of charbon (Davaine). 



La B. glaireuse. 



Filaments extremely slender, straight or elbowed ; 

 attaining 10 //, in length. 



La B. du vin tourne. 



Filaments very slender, of variable length, flexible, 

 indistinctly articulated. 



La B. des infusions. 



Filaments of 10 to 20 /u,. In various infusions. 



g. Leptothrix, Ktz. 



The Leptothrix differ from Bacilli by their 

 filaments being very long, adherent, very slen- 

 der, and indistinctly articulated. 



Their forms are numerous. The following 

 are the principal : 

 L. rigidula, Ktz. 



Length 100 to 150 /*, diameter 1.3 to 1.9 /JL. In 

 stagnant water, adherent to other vegetables. 



L. croespitosa, Ktz. 



Length 100 to 200 /*, diameter 2.4 to 2.8 /*. Upon 

 humid rocks. 



L. brevissima, Ktz. 



Length 75 to 100 /JL, diameter 2.7 to 3.5 p. In stag- 

 nant water. 



L. pusilla, Rabh. 



Length 60 to 70 /*, diameter 0.5 to 0.6 u,. 

 L. parasitica, Ktz. 



Length 90 to 150 ^, diameter 1 /^. 

 L. radians Ktz., and L. spissa, Rabh. 



Parasites upon marine algce. 



