XU A Short Explanation 
e Five oblong, crooked, hollow openings ; 
eaten through by worms. 
F OL.Ge: XVI 
“One of thofe worms awbich eat through the fhells 
of the Snails, reprefented of its natural fize. 
FIG. XVII. 
The fame Worm, reprefented as mag- 
nified. 
@ The head. b The tail. 
¢ ¢ Many fall hairs on each fide of the body. 
FIG. XVIII. 
The Snail, called Alickruyk, reprefented as mag- 
nified. 
a The head and mouth. 66 The horns. 
cc The eyes. dd The foot or verge. _ 
é Thecover of the Snail, of which only a {mall 
part is feen. 
Ff The fhell very large, with its wreaths worn 
out. 
Bede Ge x 
The cover of the Snail, reprefented as magnified. 
g The cover, whofe convolutions are formed 
like the windings of the fhell. 
PIG kk 
The tongue of the Snatl, called Aliekruyk, of its 
natural fize. 
The fore part of the tongue; fituated in the 
mouth. 
3 The part of the tongue placed within the | 
_ body, beautifully folded in ferpentine wind- 
ings. 
Ae xe 
EYL -G. al. 
The fmall water Turbo. 
a The thell of the {mall water Turbo, which 
is formed very like the viviparous Snail. 
FIG. IL 
The umbilicated marble water Snail. 
@ The fore part, formed like an umbilicus, or 
navel. 
5 'The oval broader part. 
FIG. II. 
The flattened water Snail, 
aa Thetwo lips. 45 The verge or foot. 
cc The black eyes. © dd The horns. 
e The long flender body. 
ff The air hole in the verge. 
The aperture of the genitals. 
hb The thell of the Snail flat on the left afide. 
of the TABLES. 
El Ge ply: 
The other fide of the fhell, of the fame Snait, 
reprefented. ? 
a The right fide of the thell, which is con- 
cave, and, finking in the middle, is rolled 
into itfelf. 
FIG. V. 
The fmall flattened Snail. 
@ A {mall margin, which {nrrounds the thell. 
Bel.» Vale 
The frefh water Mujfcle, found in the rivers in 
Holland. 
aa The lips or verge which furround the whole 
body. 
bb The papille, or nipples of the mutcle. 
ceccec The four large gills. 
dddd The four fmall gills. 
e The hard part of the body. 
JF The foft part of the body. 
FIG. VII. 
The infide of the fhell of the Mujcle reprefented. 
a The part, in the acute extremity of the fhell, 
where the mufcle is faftened. 
& The part in the thick or broad extremity of 
the fhell where the mufcle is faftened: where 
are vifible four {mall holes. 
¢¢c¢ The part where the mouth of the mutele 
is faftened. 
d The {piral winding of the thell. 
ee The two eminences, by the help of which 
both valves are ftrongly joined together, 
as by ginglymus. 
Pol-Ge evil. 
The Phyfalus laid on its back, in order to exhibit 
the wrinkles on its belly. 
aaa Twenty-eight of the greater, and fome 
of the feffer external, parts, extant on each 
fide of the body, and from which there 
fpring black ftiff briftles, of which there is 
but one fide to be feen in this place. 
zzz Some woolly hairs like down, of a gold 
colour, and placed under the parts, con- 
taining the lateral briftles. But I have here 
omitted thefe briftles, in order to render the 
hair itfelf more confpicuous. 
/ The opening of the mouth, above which 
appears a kind of beard, like that of beard- 
ed fithes. ! 
Ba GC Ad XN, 
One of the above eight and twenty greater exter- 
nal parts, feperated from the body, and exbt- 
bited by itfelf, with its black brifiles. 
6 ‘An Articulus, or joint, reprefented by itfelf, 
and fhewing in what manner the briftles 
grow from under it. 
bag FIG, 
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