16G DESCRIPTION OF {Pobjyaslrica. 



resembling an hernial tumour ; ten or twelve processes 

 may sometimes be seen extended at one time. Figures 

 85, 86, and 87, represent three animalcules highly mag- 

 nified ; the first has only two processes extended j in the 

 last there are several. Found amongst Navicules. Size 

 l-140th to l-70th. 



149. Amoeba verrucosa. The short-footed or warty 

 Amoeba. — Body less than that of the last species, and 

 colourless ; processes very short and blunted, resembhng 

 warts; motion sluggish. Size never exceeding 1 -240th. 



150. Amoeba diffliiens {Volvox sphoerula, M.) The dis- 

 solving Amoeba or Proteus. — Body expansible and colour- 

 less; processes longer than the last, strong and more 

 pointed. This species is a very interesting object for the 

 microscopic observer; its body resembles sometimes a 

 transparent, at other times a turbid lump of jelly, slowly 

 expanding and stretching itself out, and here and there 

 exhibiting its pointed processes, which again disappear as 

 it advances. Its motions may be compared to those of a 

 many-footed animal tied up in a sack. Found in Hackney 

 Marsh, amongst lemna. Usual size about 1 -300th. 



151. Amoeba radiosa. The radiant Amoeba. — Body 

 colourless, and less than the preceding species ; its pro- 

 cesses, which are numerous, are long and slender, pointed 

 at the ends, and apparently radiating. This animalcule, 

 when in a contracted state, is not distinguishable from the 

 A. difiluens, but when fully expanded may be likened to 

 the porcupine. It readily imbibes colouring matter. Fig. 88 

 resembles one of these creatures in a contracted state, 

 and 88* the same with the processes thrust forth. Found 

 in I300;- water. Size 1 -240th. 



