128 DE9CRIPTIOX ot [Poli/ffasfrica^ 



They multiply by a complete self-(ii\T.sion of the hody. Two species 

 only are known, the one yellow, and the other green. 



We now approach the description of living creatures, whose or- 

 ganization, on account of their magnitude, is rendered more apparent 

 to us. The red eye-like speck, the distinguishing feature of this 

 genus, Ehrenberg assumed to be a rudimentary visual organ, al- 

 though nervous ganglia subservient to it have not been perceived, 

 as in the still larger Infusiora, the Rotatoria, and in the single-eyed 

 genus of Entomostraceans, the Bothnia. This organ, together with 

 the proboscis, — its locomotive and purveying instrument, the beau- 

 tiful green homogenous granules (seen in M. monadina, which, by 

 their shape and situation in the body, leave no reasonable doubt of 

 theii' being ova,) and the grey rolled band-like seminal gland, de- 

 monstrate that these living atoms are endowed with an organization 

 (a sensitive one two) as comfortable to their particular uses, and aa 

 well adapted to supply the wants of the creatures, as those even in 

 the largest fish. Still are we left to conjectm^e "with respect to their 

 possessing a vascular system or not ; it has never been perceived, and 

 we can only argue, as we have done already, that if there be one, the 

 vessels in being so minute must necessarily be of such delicate 

 structure, that we may not as yet have foiind out the means of 

 making ourselves acquainted with them. 



MiCE0GLEXAj9«<?«c^?/f?'« {Enchelys pimctifera M.) — Colour yellowish, 

 form oval, or almost conical ; terminated acutely at the posterior ex- 

 tremity. Eye, red with a blackish central spot, as if a secondary visual 

 appendage. Eound among slimy water plants. Size 1 -620th. 



M. monadina. — Beautiful green-colour ; form ovate, rounded 

 equally at both extremities ; a distinct single red eye, proboscis 

 nearly as long as its body ; motion vibrating, rotatory on its long axis. 

 Figures 12, 13, and 14, represent three animalcules magnified, the 

 first 800 diameters, exhibiting all the internal organization noted 

 above. Found among slimy water-plants (Hampstead and Finchley). 

 Size l-2300th to l-720th. 



Genus Chloeastee. — Solitaiy, without tail: mouth terminal : 

 with a frontal ocellus, central portion of body with radiating rows 

 of raised points fveruccce.J It is allied to the genera Glenomorum. 



