IjQ DESCEitTiON OF \^Polijgustrica 



motion of this creature is tremulous, or slowly revolving upon its 

 longitudinal axis. Found in the water of bogs. Length of cluster, 

 l-4800th to l-2304th ; ditto of link, or single animalcule, 1-1 1520th. 

 Group 58 represents several of them ; two towards the right are 

 magnified 1000, the others 290 diameters. 



Bactemum enehelys. Chain composed of somewhat indistinct animal- 

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

 ceding, transverse lines faintly marked, colourless. Found in river 

 water. Length of cluster, 1-2 8 80th. 



B. punctum. Chain composed of indistinct animalcules colourless, 

 approaching to a globular form, much smaUer than the preceding 

 species, and developed in cylinders, transverse lines faintly marked. 

 Found in water wherein bread has been steeped. Length of cluster, 



1-4032. 



The following species is added by Dujardin : 

 B. catemU. (D.) Filiform, cylindrical. Length of individuals, 

 l-8600th to l-6500th, 3, 4, or 5 axe united together, forming a chain 

 l-1300th in length. 



Genus Yibkio. The tremUing Ammaleules. -Thi^ genus is charac- 

 terisedby the animalcules being connected together in filifoi-m chams, 

 of a flexible nature, resembling the body of a snake. These chams, 

 ^s akeady remarked, are produced thi'ough incomplete self-division. 

 The difficulty of ascertaining the internal organization of this genus 

 has not, as yet, been surmoimted, although it is fair to presume that 

 there is notHng of a tubular character, or intestinal canal, running 

 alono- ^thin their fihform bodies, similar to that of the vinegar 

 eels^r it would most probably have been demonstrated by the 

 aid of coloiu-ed food; for aline is much more easily distinguished 

 than a point. Fhrenberg supposes, that each link in the cham 

 is a closed, round. Monad-like body, having a nutritive apparalnis 

 of a polygastric description. v i • i 



V lineola {Bacterium termo, I)uj.)-Qlu^i^r, a minute cyhndiical 

 and sli-htly flexible wand, rounded at both ends, and made up of 

 bodies Somewhat indistinct, but of nearly globular form, and coloui- 

 less Commonly foimd in vegetable infusions, especially roimd the 

 stalks of flowers in glasses Length of wand, from l-3600th to 

 l-200th. Thickness 1 -3600th. 



