A Short Explanation 
PV Gl-3X 
The faid brifiles, reprefented in three orders, as 
they appear when plucked from the parts pro- 
ducing them. 
c The ligament that connects the briftles, 
and afterwards appears about all the other 
briftles. 
d Two of the largeft and ftiffeft briftles with 
their ligament, which is placed almoft in the 
middle of them. 
e Six briftles with their ligaments forme of 
which are more fine and delicate than others. 
J Eight briftles with their ligament, differing 
in ftructure, length and ftiffnefs. 
OG Sex T 
One of the faid briftles feen through a microfcope 
g A flattith briftle ending in a point. 
'F IG. XII. 
Another brifile viewed likewife through the 
microfcope. 
6 A \ong round f{mooth briftle, fomewhat 
more {wollen on the forepart, but afterwards 
_ terminating in an obtufe point. 
FIG. XII. 
Some hairs of a golden colour, with their roots. 
& Some very fine hairs, like down, {pringing 
alfo from one centre or fpot like the briftles. 
| De CCG 
The floping region of the back, covered with 
brifiles and delicate hairs, and moreover of a 
fomewhat convex form. 
FIG. XV. 
The back of the Phyfalus laid open. 
aaaaaa The natural openings on each fide 
of the body, thro’ which the water flows to 
and from the gills. 
6666 The membranaceous gills which move 
freely one over another, like the larger {cales 
in fifh. 
FIG. XVI. 
The tnteflines of the Phyfalus rudely delineated. 
@ The ftruCture of the inteftines, which look 
as if they communicated with one another. 
ASB. OXY. 
Pirer hy 
The Gancellus, with its bony or felly fein 
@ The fhell, or true fkin of the cancellus, 
6 The five fpiral windings of the fhell. 
¢ ‘Two eyes, below which are fome briftly ar- 
ticulated hairs. 
of the TABLES. 
dd Two horns. 
é The right arm, and its forceps, which is the 
largeft. is 
Sf The left arm, which is the leaft: 
gg The four foremoft legs. 
Ge iy 
The Cancellus; out of its fkin or hell, lying on its 
back. 
086 
Xil 
aa The eyes, between which are feen four 
briftly articulated hairs. 
66 The horns: ¢ The left and leaft arm. 
d The right and largeft arm. 
e The two firft pair of legs. 
Sf The third pair of legs, which has {mali 
forceps. 
gg The fourth pair of legs, which are worthy 
of notice, becaufe perforated by a double 
little tube of the genitals; to which it yields 
a paflage. 
hh ‘Three articulated briftly hairs, to which the 
eggs are ftrongly fixed. | 
2 The tendinous poitit of tlie mufcles, oi the 
part in which the tendons of the mufcles 
meet, and where the Cancellus is fattened 
in his fhell, that it can nevér go entirely 
out of it. 
& The tail, with its particular part. 
FIG. If. IV. and V, 
The tail, the frraight and clofed guts, and appens 
dages of the Cancellus, reprefented a little larger 
than they naturally are. 
a The tail, confifting of two teftaceous arti- 
culations. 
b The verge of the anus, which being berit 
inwardly may be hid under the tail. 
c The ftraight gut. 
dd Three little teftaceous bones on each fide 
of the tail, which are articulated am 
themfelves and with the bone. 
e A {mall part of the inteftine. 
Jf The blind or clofed gut, or what ig anolo- 
gous to it. n 
g§ The appendages, which in the living creas 
; ae are feen ere through it. 
e origin of the appendages, which fprin 
si leeStcbiewer ciflnied dee," ee 
zz ‘The appendages, whofe fituation was fhewn 
at letter gg, are feen here feparated, 
FIG. VI. 
One of the pair of legs feparate from the ref, 72. 
prefented magnified, together with the genital 
veffel, entire, by which that les is on one fid 
perforated. 3 ue 
ong 
12345 The five articulations of the fourth 
pair of legs. 
aa The winding of the genital veffel. 
46 Its fpiral windings which terminate in one 
' narrow tube. 
D ¢ The . 
