16 PY AST EV. 
It breaks from the egg perfeétly formed, but very minute and tranf- 
parent ; this is therefore the beft time to difcover its ftruture, and 
from one in this ftate we have taken our figure. 
By the antenne it direfts its courfe, as does the Monoculus Quadrt- 
cornis; and like it alfo it hath two eyes fixed in the fhell, but it can com- 
pletely envelope its head in its bivalve covering ; its ese is beneath, 
but the numerous filaments it darts forth, caufes fuch a violent motion 
in the water, that the minuter infeéts are unrefiftingly drawn between 
them, and forced to the moutk, 
The motion of its lungs is very vifible, as are alfo the veffe ramilf- 
fying thence. Its food is carried to, and digetted in the deep-coloured . 
tube, or inteftine, and the refufe is difcharged by a fudden jerk from 
the extremity of the tube, or anus. 
Thus it exifts, a life of rapine and deftru@ion, enjoyed at the ex- 
pence of the lives of thoufands; and as the objeéts of its ravenous dif- 
pofition are defencelefs, fo they are the fport of their conqueror: the 
few moments of intermiffion its craving appetite grants them, is occu- 
pied equally in the {poil, firft prefling them to death, and then tofling 
them undevoured into the fluid, 
But fhould a more powerful infe& oppofe him, he immediately con- 
traéts his parts, and nothing more than the external covering is open to 
his antagonift’s violence, and he will fooner die ignobly than offer the 
leaft oppofition. 
Pe Ge ir 
This animalcule is very minute, and appears like a fine membrane 
without inteftines before the microfcope; from the appearance of its 
winged fides, it is fuppofed to refemble a bird. It is called Burfaria 
Hirundinella. 
fl Ga, 
The back and fide view of an animalcule found in ditch-water on 
duck-weed, very pellucid, and fingularly marked in the inteflines ; 
tail moveable, and thereby it direéts its courfe. 
PL Acme 
