Vibrionia.'} INFUSORIAI ANIMALCUrES. 171 



ViBETO tremnlans. Wand short ; stouter, yet more flexible, than the 

 preceding ; articulations of an oblong form, but not distinct, . Found 

 in water emitting a disagreeable odoiu-. Length of wand, 1 -3600th. 



V. suitilis. AYand slender and elongated ; colom-lcss ; articulations 

 distinct ; motion slightlj^ vibrating, ^^'ithout varying the direct posi- 

 tion of the articulations. Length 1 -450th. Thickness 1 -24000th. 



V. rupda ( Vibrio rcffula, M.) Wand elongated, and stouter than 

 the preceding ; articulations distinct, and colourless ; motion brisk 

 and serpentine ; common in infusions. Length 1 -580th. Thickness 

 1 -12000th. 



V. prolifer. Wand short, stout, and coloiu'less ; articulations dis- 

 tinct. Motion slow and tortuous. Foimd in infusions where mildew 

 is present. Length 1 -1100th. 



V. lacillus, (M.) Wand stout, elongated, and transparent ; articu- 

 lations sometimes distinct, at others, only so when taken from the 

 water and diied ; motion serpentine ; form sti-aight when quiescent. 

 Group 59, represents thi-ee wand-like clusters. Found in vegetable 

 infusions in fetid water. Length 1 -200th. Thickness 1-1 7200th. 



V. synxanthus. Wands (Bacilli) very fine and short, rather flexuose, 

 rarely, if more than five segments (individuals) yellow and minute. 

 Size of each animalcule 1-70, 000th to 1 -52000th. Found in decom- 

 posing cow's-milk producing a yellow tint. 



V. syncyanus. Wands very slender and short, somewhat flexuose, 

 of seldom more than five segments, very small, and of a blue colour. 

 Size l-78,000th to l-52,000th. Also found in cow's-milk, and pro- 

 ducing a decided blue shade. 



The following species are fi-om Dujardin's work : — 



V. serjmis (M.) Body very long, fUiform, undulating, generally 

 pursuing a rectilinear coiu'se, with fi'om ten to fifteen bends in its 

 length. Length 1 -1050th. 



V. amliguus. Under this name, Dujardin describes a vibrio with 

 stiff filiform joints like those of V. hacilhis, but much larger. Four 

 or five, or even more, were articulated together ; owing to the large 

 dimensions, each joint could be seen composed of a resistant tube, in 

 which a glutinous substance was collected more or less closely. More- 

 over, a bifui'cation at the exti'emity of a joint was sometimes seen to 

 occur, giving rise to two series, more or less extended. 



N 2 



