302 The Water-Flea with branched Horns . 
quick Vibration, and at others a rotatory 
Motion, occafioning a rapid Current in the 
Water. 
Their Ova are carried at the Tail End* 
either fattened to the Tail itfelf, of to the 
ProcefTes of the Shell, as at Jig. 12. One* 
two, or three are the Number ufually hang¬ 
ing to them ; but fome, though very few, 
have four or five. The Young burft their 
Integuments, and are hatched very probably 
like the Species before deferibed ; but hav¬ 
ing never had the Pleafure of feeing then! 
do fo, I can fay nothing more to this Part 
of their Natural Hiflory. 
CHAP. IX 
The Water^Flea with branched Horns, 
True Figure and Defcription of this 
little Creature having never yet been 
publifhed amongft us, what follows I hope 
may prove acceptable. 
The Name given it by Swammerdam , of 
Fulex aquaticus arborefeens, I chufe to retain 
here, as exprefling aptly enough its Motions 
and Appearance.—It is found in Refervoirs 
of Rain Water, in Bafons, Ponds, Ditches, 
&c. where the Water is not often renewed 5 
and that fometimes in fuch Abundance, as 
by 
I 
