1O2 The BOOK of 
entraneous nourifhment, unlefs perhaps fome 
naturalift fhould choofe to confider this as a 
complete infect, rather than as an egg: nor 
fhall I ftrenuoufly oppofe this opinion, feeing 
that in all cafes the egg is in reality no other 
ros Neal Ob Dy 
AMONG the internal parts of the water 
Scorpion, the organs of generation feem 
to be thofe which beft deferve our attention, 
and which I have accordingly moft attentively 
examined. ‘The contents of the ftomach and 
inteftines were of a green colour, but thofe 
vifcera when emptied appear of a tranfparent 
white, with here and there fome tranfparent 
glandules of the fame colour. Behind the 
pylorus are fome varicous or knotty veffels. 
The abdomen is all over covered alfo with 
particles of fat of a moft bright white, which 
look as if they were divided into many appen- 
dages of the nature of the inteftina ceca. 
The number of pulmonary tubes is here 
very confiderable, compared with that which 
is {een in the generality of other infects. ‘The 
larger branches of thefe tubes are of a yellowifh 
colour, and the fmaller of a filver white. 
‘Their. openings lie under the wings on each 
fide of the abdomen. The breaft contains two 
air bladders. The fpinal marrow confifts of 
very few joints. 
The parts of the male fubfervient to gene- 
ration appear of a moft delicate and exquifite 
contrivance, fo as to deferve our moft f{pecial 
notice; and the diffection of them took me up 
fo much time and attention, that in taking 
drawings of them I at firft overlooked the 
penis. This is placed backwards near the in- 
feét’s anus, where there are feveral other parts 
worth examining. The root or nervous body 
of the penis, Tab. III. fig. vi. a, which is of 
a white colour, lies a little higher up in the 
abdomen, I have reprefented it here as it ap- 
pears when taken out of the body. ‘This root 
of the penis, after having made many ferpen- 
tine turns, divides into four tubes, two of 
which conftitute the vafa deferentia, whilft 
the other two perform the office of the veficule 
feminales in other animals, and open into the 
cavity of the root of the penis, where they dif- 
charge the matter prepared by them. I have 
given an exact drawing of the vafa deferentia ; 
one of them I have reprefented as it appears 
moft curioufly convoluted in its natural ftate 4; 
the other as itlooks when drawn outc. Thefe 
vafa deferentia are confiderably wide and f{pa- 
cious, but not equal to the veficule feminales. 
It is probable thefe veffels are adapted by na- 
ture to fecrete a feminal matter different from 
that prepared by the tefticles; for they are 
largely fupplied with glandules to anfwer that 
purpofe, and confift of a confiderably thick and 
{fpongy fubftance. As the vafa deferentia ap- 
proach the tefticles, they grow lefs and lefs by 
degrees, fo as to form two flender tubes dd, 
NATURE; of, 
than the infect itfelf, which remains in that 
ftate till it has acquired ftrength fufficient to 
break its prifon, and live without fuch a 
covering. 
LON SEAESREN AML) MERARa eS: 
and this portion of them alone feemis to claim 
the name of vafa deferentia, as they do nothing 
but convey the feed from the tefticles: thefe 
tefticles confift each of five diftin@ bodies, 
feparated on all fides, oblong, white and glan- 
dulous ee, with which are united as many 
feminal veffels twifted and coiled one over ano- 
ther very elegantly, and in a great variety of 
directions ff. I have reprefented one of them 
as it appears when feparated from the reft, 
and extended g. The veficule feminales are 
fomewhat fhorter 44, but they are a little 
wider than the vafa deferentia. The former 
contain an aqueous feminal matter, which in 
the tefticulary vefiels, the glandules of the 
tefticles, and even the vafa deferentia them- 
{elves appear of a fhining white. From this 
we may conclude that the mechanifm of thefe 
genital parts refembles greatly that of the fame 
organs in the Rhinoceros Beetle, which I thall 
hereafter defcribe. Indeed in refpect to the 
vafa deferentia, the tefticulary veflels, and the 
veficule feminales, they are not unlike thofe 
of the human fpecies ; and this refemblance 
is very worthy our notice, in order to difcover 
the general analogy between animals by a care- 
ful comparifon of their organs, as exhibited to 
us in accurate diffections. 
Among the parts of the female fubfervient 
to generation, the moft confpicuous is a fur- 
prizing kind of ovary, divided on each fide 
into five oviducts, one of which I {hall here 
reprefent, and in part the reft being fimilar, 
fig. vil. aa. ‘Theeggs contained in thefe ovi- 
ducts are of fo curious a ftructure, and placed 
with fo much art, wifdom and judgment, that 
I muft own I never met with any thing con- 
trived more nicely, or more elegantly difpofed. 
That this contrivance and difpofition may ap- 
pear the more diftinétly, I fhall firft defcribe 
the egg itfelf, which in fhape greatly re- 
fembles the feed of the carduus benedictus. 
This egg is a little oblong, of a yellow colour, 
with its lower furface fomewhat convex, fig. 
vill. a. The edges of the upper furface are 
elegantly adorned with feven flender branches, 
not unlike ftiff briftles very red at the points 4, 
and white in the middle e, fo as to afford a 
very entertaining appearance. That  thefe 
briftles may be in no danger of creating con- 
fufion in the ovary, or of wounding it, or the 
eges, or receiving themfelves any damage by 
bending, the briftles of the firft egg, or that 
which is next to the aperture of the ovary, lie 
flat againft the edges of the fecond egg, fo as 
to form a kind of bed for the lower and con- 
vex furface of it c. The third d and all the 
other 
