XIV A Short Explanation 
c The extremity of its end. 
d ‘The part in which the genital veffel, after a 
wonderful manner, perforates the fourth pair 
of legs throughout the fifth articulation. 
FIG. VII. and VIII. 
The heart and one of the gills, reprefented as 
magnified. 
aa The heart. 6 Four veffels iffuing from 
the upper part of the heart. 
¢ Two other veflels iffaing from the lower part 
of the heart. 
d Some blood veffels difcharged of their fleth, 
and rolled out. 
e One of the XXII gills. 
J The thick and broad part of it 
g The acute extremity. 
6 The divifion of the gills. 
"N. B. Thofe white hollows or grooves, which run longitudi- 
nally through the middle of the gill, fbew the cartilages, 
near which the blood vefféls are conveyed; in which part 
they appear thicker and whiter. 
FIG. IX. X. and XI. 
The brain, fpiral marrow, eyes, cornea, and in- 
verted pyramidal fibres, reprefented as magni- 
fied, beyond their natural fize. 
aa The brain. 
66 The optic nerves, one of which is laid en- 
tirely bare. 
c The origin of the fpiral marrow, which is 
feparated, and affords in the living infect a 
paflage for the gullet to the ftomach. 
d The firft knot or fwelling, with the nerves 
it emits. 
eeeee The remaining five knots of the marrow. 
Sf Nerves which {pring from the marrow. 
g Thefe nerves elegantly decuffate one over 
the other, iffuing from the right to the left, 
and from the left to the right fide: 
b Part of the cruft as yet fticking to the eye, 
near which the naked nerve is vifible. 
7 The cornea tunica, and the manner by which 
the annular cruft like a tooth infinuates itfelf 
into it. ; 
kA gelatinous hexagonal matter placed within 
the eye, above the inverted pyramidal fibres, 
which appears on removing of the cornea. 
J The inverted pyramidal fibres and their fitu- 
ation. 
m ‘The black part of thofe fibres, which {pring 
from the tunica uvea. 
n The lower part of the fibres which appears 
brown. 
o The middle part of them which is limped. 
pp Acertain part of thofe fibres, enlarged by 
the microfcope, by which it appears, that 
each of thefe fibres confifts of many other. 
{mall fibres, all which are again compofed 
of regular globules. 
of the. I. gaB La S, 
T A By KH, 
No. I. The vermicle or worm of the Libella or . 
- Dragon-fly, flicking as yet in its firft fkin, 
when it is called an egg: reprefented mag- 
nified by the microfcope. 
II. The egg itfelf, deferted by the worm, re- 
prefented of its natural fize. 
III. The worm, as come out of the egg, cal- 
led, by this author, an Oviform Nymph- 
vermicle. 
IV. The fame worm a little more grown, when 
the follicles, or membranaceous bags of the 
four wings are obferved to fpring. 
V. The fame worm, perfect, with its four fol-- 
licles or little bags, increafed to their due fize, 
called in this {tate the Nymph-Vermicle. 
VI. The Libella or Dragon-fly in its perfect 
ftate, having attained its fullage, and fit for 
generation. 
Feb Gy as 
The egg of the Dragon-fly, as magnified by the 
microfcope. 
FIG. ff. 
The Nymph-Vermicle of the Dragonfly, cafting 
ats fein. 
aa The feet fixed with the claws. - 
& The head and eyes burft forth. on 
éc The fix legs, now cleared from their fkins: 
dd ‘The wings, as yet folded up. 
Fel G. cE 
Of the copulation of the Dragon-flies. 
a the tail of the male. 
4 The female receiving into her neck the tail 
of the male, and embracing it with her legs. 
c The tail of the female turned toward the 
breaft of the male. 
FIG. IV. 
The nymph of the largeft Dragon-fy. 
aa Theeyes. 64 Thehorns. ec The teeth, 
dd The legs armed with harp claws. 
ee The little bags, or cafes of the wings. 
Sf The divifions of the abdomen, 
g The ftings, or prickles of the tail. 
Blo Gir Ves 
The Nymph-Vermiele of the middle fized Dragon- 
Sy. 
a The lips and teeth. 4 The hairy legs. 
c The little bags, or cafes of the wings. 
d The ftings, or plickles of the tail. 
PETG. Vi. 
Eoin bn eee alin aes Ss ee oe eee 
lesions NT ee See PO I PT TES Re ie En RR ee ee 
ae 
