142 NATURAL HISTORY 



GENUS XV. 

 HIMANTOPUS. 



PELLUCrO ANIMALCULES, WITH A CLUSTER OR TUFT 

 OF HAIR. 



336. HiMANTOPUS acarus.-— The mite animalcule is 

 in the form of a pointed pear with the fore part 

 diaphanous, and capable of elongation, and fringes of 

 cilia may be discerned on its inferior side : it has four 

 long setaceous hairs near the posterior 3 these it employs 

 as feet, and runs very nimbly. Found among lemna, but 

 scarce. 



336. HiMANTOPUS larva, — This is a very lively crea- 

 ture, swimming and turning in the water in a graceful 

 and diverting manner, inflecting itself, as shewn at 

 figure 195 : the body gradually decreases towards the 

 posterior, and at intervals several hairs appear disposed 

 along it. The margin is fringed, as shewn in the figure. 



337. HiMANTOPUS ludio. This animalcule, like the 

 ])receding, is remarkable for the agility of its movements ; 

 it resembles it also in form, although it is more blunt, 

 and the tail appears forked : the upper margin is fringed, 

 and it has two clusters of long vibrating hairs on the in- 



