Vibrionia.] THE INFUSORIA. 133 



to l-2304th ; ditto of link, or single animalcule, 1-1 1520th. 

 Group 58 represents several figures of them ; those two 

 towards the right are magnified 1000 diameters, the 

 others 290. 



90. BACTERIUM ? enchelys. The Monad-like Bacterium. 

 Chain composed of somewhat indistinct animalcules, of 

 an oval form, developed in smaller cylinders than the pre- 

 ceding, transverse lines faintly marked, colourless. Found 

 in river water. Length of cluster, 1 -2880th. 



91. BACTERIUM punctum. The point-like Bacterium. 

 Chain composed of indistinct animalcules, approaching to a 

 globular form, much smaller than the preceding species, 

 and developed in cylinders, transverse lines faintly marked, 

 colourless. Found in water wherein bread has been 

 steeped. Length of cluster, 1 -4032nd. 



Genus XXVII. VIBRIO. The trembling Animalcules. 

 This genus is characterised by the animalcules being con- 

 nected together in filiform chains, of a flexible nature, 

 resembling the body of a snake. These chains, as we 

 have already remarked, are produced throught he creatures 

 incomplete mode of self- dividing. The difficulty of ascer- 

 taining the internal organization of this genus has not as. 

 yet been surmounted, although it is fair to presume that 

 there is nothing of a tubular character, or intestinal canal, 

 running along within their filiform bodies, similar to that 

 of the vinegar eels, or it would most probably have been 

 demonstrated before now, by the aid of coloured food; 

 for a line is much more easily distinguished than a point. 

 Ehrenberg supposes, that each link in the chain is a 

 closed, round, Monad-like body, having a nutritive appa- 

 ratus of a polygastric description. 



