386 Animalcules found in Water * 
The two Figures 5 and 6 are I believe 
only different Appearances of the fame In- 
fedt, altho’ there is fome Variation in the 
Make of the Shells, but in all other Refpedts 
they-agree. I at fir ft took this Infedi for 
the Puiex arbor eficens , and certainly it may be 
claffed with it: but comparing it with Swam¬ 
merdam's Figure, it by no Means- agrees 
therewith, nor with that which you fhewed 
me *; for in this there are four Brachia, 
ramojk , in the other only two; thefe here 
are lower, and proceed from the Iniedjt un¬ 
der the Shell, the others are on each Side 
the Head and from the Shell. This Infedfc 
has two Antennae, and that has none, but a 
Bill like a Bird’s.— I have drawn thefe as 
they appeared fwimming with their Backs to 
the Eye, where the joining of the Shells is 
vifible, which feemed ridged or marked with 
black. Streaks as in the Figures : the Colour 
was a deep brown. 
In fome Pond Water, with the Lens pa** 
lufiris I found the Infects of which I lent 
you the Drawings,fig. 7. and 8. The firft 
of thefe, fig . 7. was contained in four very 
thin transparent Shells. The two upper 
Shells united on the Back, and declined down 
the Sides till they met with two under Shells, 
making at the joining of the Sides acute 
* The Figure here mentioned may be feen flats XII*. 
fg- H- 
Angles* 
