JEnchelia.'] infusoeial animaicttles. 551 



Enchelm (Encliclycns) and named after a gonus Enclielya, is instituted. 

 But most unfortunately for science, this family and this genus, in the 

 animalcules they include, in no way correspond with the similarly 

 named family and genus of Ehrenberg. This is remarked by 

 Dujardin himself, and he adds, with reference to the genus Enchelys, 

 that, in the whole course of his observations, he has never met with 

 any Infusoria beaiing the characters attributed by Ehrenberg to that 

 genus, and he is led to conclude that the beings described by that 

 observer arc Paramacia, with a terminal mouth, or else Bursaria 

 imperfectly examined, and the cilia of the surface overlooked. 



Moreover, the family CycUdina (Ehr.) seems much more nearly allied 

 to the Enchelys of Dujardin, but its characters, as given by Ehren- 

 berg, are not sufficiently definite to attempt an identification. 

 Dujardin defines his genus Enchelys as having a cylindrical, oblong, 

 or ovoid body, covered with erect uniform cilia, irregularly disposed. 



Genus Enchelys. The cylinder Animalcules. — Body single, no 

 vibratile cilia upon its sui'face ; mouth ti'uncated (direct, not oblique), 

 devoid of teeth. A wreath of cilia is distinctly to be observed 

 aroimd the mouth in three species ; in one it is indistinct. In E. pupa 

 the form of the alimentary canal is accurately seen ; the polygastric 

 cells, mouth, and discharging orifice, are recognized in all. In 'E.pupa 

 and nebulosa, very delicate ova granules are observable, and in E. 

 farcimen a contractile bladder. Self-division is transverse and 

 complete. 



'E. pupa (J^.) — Body turgid, club-shaped, attenuated anteriorly. 

 The granular ova are of a pale yellowish-green colour, and disposed 

 aroimd the stomach cells ; neither glands nor contractile bladder are 

 visible. Eigs. 258 and 259 represent two specimens : in the first 

 the ciirrcnts produced by the cilia around the mouth are distinct ; 

 they are both represented as fed on coloured substances. It ia 

 remai'kable that this is the only species of Polygastrica of which 

 Dr. Ehrenberg has figured, in his large work, the form of the 

 nutritive system separately. Common in stagnant bog water. 

 Length 1-1 40th. 



E.> farcimen (E. farcimen et Vibrio intestinum, M.) — Is smaller, 

 more cylindrical and slender than the preceding ; the ova are whitish. 

 These creatures prey on other animalcules nearly as large as them- 



