122 NATURAL HISTORY 



curious animalcule, which is shewn, magnified, at figure 

 134, is of a globular form, furnished at its anterior end 

 with a number of long setaceous hairs, and at the oppo- 

 site extremity are often attached by a thread one or two glo- 

 bular bodies, probably young. Found in clear river- water. 



232. Trichoda granata. The granulated Trichoda is 

 probably only a variety of the last : the interior is 

 opaque, and the circumference furnished with cilia. 

 Found among duck-weed. 



233. Trichoda trochus. 



234. Trichoda gyrinus. — These two species are so 

 much like the Trichoda grandinella, that it is unnecessary 

 to give a separate description. The last is very small, 

 and found in sea- water. 



235. Trichoda sol {Actinophrys sol, E.) The sun Tri- 

 choda. — This animalcule is globular, as shewn at fig. 156, 

 and covered with radiated hairs : in its interior may be 

 counted as many as twenty polygastric sacs. Its 

 mouth is elongated into a proboscis, as shewn at fig. 158; 

 this the creature can contract at pleasure, and when 

 turned towards or from the observer, appears like an 

 oval sac, as shewn by the dotted line and cross below 

 figure 156. It propagates by division ; one of which, 

 about to separate into two, is shewn at figure 157. 



This creature is an interesting object for the micro- 

 scope : it preys upon other animalcules by suction, and 

 has been found attached to the Kerona pustulata. Size, 

 l-900th of an inch. 



236. Trichoda vulgaris. — This animalcule forms a 



