328 '" ** ' >-' BACTERIOLOGY. 



MonaS Okenii. Short cylindrical cells, 5 //, wide, 

 8 15 fi long, with rounded ends. They undergo lively 

 movements, each end being provided with a flagellum 

 twice as long as the cell itself. They have pale- red cell- 

 substance with dark grains. They occur in stagnant 

 water. 



Rhabdomonas rosea. Spindle-form cells, 3-8 

 5*0 //- broad, 20 30 //, long. They exhibit slow, trembling 

 movements, having at each end of the cell a flagellum. 

 The cell substance is very pale, with dark grains inter- 

 spersed. In brackish water. 



MonaS Warmingii. Cylindrical cells, rounded at 

 the ends; 15 //. long, 5 8 Abroad. They are possessed 

 of a flagellum at each end of the cell, and exhibit rapid, 

 irregular movements. The cell substance is pale* red, and 

 studded at the rounded ends with dark-red grains. 



Genus III. Phragmidwihrix. 



SPECIES. 



UNASSOCIATED WITH DISEASE : 



Phragmidiothrix multiseptata . . Simple saprophyte. 



Phragmidiothrix multiseptata. Cocci and 

 threads. The latter, 3 6 ^ in breadth, are 

 separated by transverse partitions into short 

 cylindrical discs, whose height is a fourth or 

 sixth of their breadth. Repeated transverse and 

 longitudinal division takes place in the discs, 

 resulting in the formation of cocci. The cocci 

 have not been observed isolated from the 

 threads in a free state, but they develop in situ 

 into slender threads. In addition to this continuous 

 subdivision, .Phragmidiothrix differs from Beggiatoa 



