A Short Explanation of the TABLES. 
PolnGagi Vii. 
Some of the pulmonary veficles. 
a Its membranaceous part, which was full of 
air. 
5 The pulmonary tube, through which the 
air paffes to the veticle. 
¢ Two lateral pulmonary tubes. 
Helae ic Vil. 
The genital parts of the male. 
a The penis and its two appendages. 
66 Two twifted horny bones belonging: to 
the penis, and articulated with the fheath, 
through which the penis erects itfelf. 
c The flexible part of the penis. 
dd Two little black horny bones, forming a 
border round the extreme ring of the abdo- 
men, and articulated with the former bones. 
ee Places where the articulations appear. 
Ff The nervous body of the penis. 
g A dilatation of the root of the penis, with 
which the vafa deferentia, and feminal vef- 
{els empty themfelves. 
hb The tefticles. 77 The feminal veffels. 
_ kk Short tubulated feminal veflels, laid bare 
in one of the tefticles. 
7 Veftels for the conveyance of the feed. 
m m Windings of the feminal veficles, the ex- 
treme ends of which are dilated. 
FIG. VUt. 
The ovary. of the female. 
aa The ovary confifting of two parts. 
& The laft rings of the abdomen. 
ccc Some protuberances of a fubftance be- 
tween bone and horn, appearing like {pots 
on the laft abdominal ring. 
d Hairs growing in the fame place. 
eee Eggs belonging to one fide of the ovary, 
as yet in their natural fituation. 
f The fame eggs a little more magnified, and 
. removed out-of their natural fituation. The 
remaining part of this ovary is marked by 
dots. . ; 
g Pulmonary tubes interwoven with the ovary. 
‘Some branches of the faid tubes difperfed 
both within and without the coats of the 
eggs. 
éz The greateft extreme branches of the faid 
tubes. 
k ‘Two ducts of the ovary, by which the eggs 
are let out of the body. 
Z Three beautiful unknown particles, each fup- 
ported by its ftalk, 
- m The point of the inflexion of thefe tubulated 
particles. 
a Their tubes and windings. 
o That end of the tubes which lies neareft to 
the duct of the ovary. 
Ixisx 
TAB. XLIUL 
The Hiftory of the Acarus, or Mite. 
ib laGoanl, 
The Acarus or Mite, of its natural fixe. 
PelG. © ii, 
A microfcopical view of the Acarus. 
1234567891011 12 The twelve rings 
of the body. 
a The head, in which are feen two nails be- 
longing to the infect’s legs, with which, 
whén about to fpring or leap up, it com- 
preffes its anus. 
5 The larynges or tops of the afpera arteria, 
projecting beyond the fkin. 
cc The place where there iffue from the main 
tranfparent trunks of the afpera arteria, two 
branches, which unite by a mutual anafto- 
mofis, or inofculation with the branches of 
the fourth ring. . 
ddddddd The inofculation of the pulmo- 
nary tubes, which appear through the re- 
maining rings of the body. 
e r particle of the fat appearing through the 
in. 
Jf Some blind guts, appearing in the fame 
manner. 
g Aconfiderable branch of the afpera arteria, 
which appears through the fkin under the 
tenth ring, between the two principal 
branches of the trachea. 
b A beautiful particle of fat, appearing under 
the eleventh ring, and near which may be 
difcoverd the two extremities of the branches 
of the trachea. 
FIG. Itt. 
The manner in which the Worm bends itfelf into 
a circle, in order to prepare for leaping. 
ForG, IV, 
The manner in which the circular form changes 
to an oblong one; jujt as the Acarus is about to 
leap or fpring. 
meieG,  V, 
The feet, parts of the mouth, flomach, inteftines; 
and fome other vifcera of the Acarus, as viewed 
with the microfcope. 
aa Vhe feet or teeth, and nails. 
66 Origin of the horny bony parts of the 
mouth, and palate. 
e¢ Four appendages of the faid parts. 
d Horny bones, which ferve to keep all the 
parts in their proper fituation. 
e The dilatation of the gullet, which I call 
the ingluvies. 
Jf Four blind appendages under the ingluvies. 
N gg The 
