A Short Explanation of the TABLES ix 
TAB. VIL. 
FIG. I. 
The Turbo or Verticillum., 
a The beginning of the windings of theTurbo. 
6 The end of thofe windings. 
FIG. II. 
Lhe voluta, or the cylinder or pyramidal Snail, 
a ‘The opening or entrance of it. 
5 Where it becomes narrower. 
¢ Another convolution or winding. 
d The pillar and the other internal {piral wind- 
ings of it. . 
FE Gs “Ti. 
The Concha Venerts. 
a The entrance divided into little teeth. 
& The windings round the pillar. 
PyL.G.. IV. 
The pencil Snail. 
a The outward entrance of it. 
4 Another of its winding divifions. 
¢ Thethird. od The fourth.  e¢ The fifth. 
J The fixth,  g The feventh. 
FIG. V. 
The tubular Snail. a 
@ The beginning like a plain tube or inteftine. 
4. Its fpiral windings and convolutions. 
EY EGi5 VE 
The tubular Snail. 
cc The cavities which the tubular Snail forms, 
when the partitions of it are gradually con- 
volved together, and applied one to another. 
But if their cavities are joined to others, the 
cavity of the pillar is thereby formed. See 
Tab. VI. Fig. Il. r. 
FIG. VI. 
A Snail like the Cornu Ammonis. 
a The hollow perforated partition in the be- 
ginning of the Snail, | 
12345 &c. The divifions of the Snail, which 
are formed by the various number of the 
partitions. | 
F IG. VIII. 
The partitions, with the naked Surrounding fbell, 
56 Six partitions, from which the outward 
fhell is removed. 
c The part where the little tubes of the parti- 
tions are mutually received, 
FIG. IX. 
A partition, with its little tube reprefented of a 
large fixe. 
ddd ‘The extreme compafs of the partition. 
e The aperture of the partition which leads to 
the little tube. 
f The perforated handle, or little tube of the 
partition. 
Pe Gs XG 
Three partitions of different fizes, which mutually 
receive each other. 
g& The little tube of the firft partition, fixed 
into the little tube of the fecond partition. 
hb The little tube of the fecond partition, fixed 
in the tube of the third partition. 
2222 The partitions, with their little tubes 
gradually decreafing in fize. 
FIG. XL 
The oval Turbo, with its windings turned contrary 
to thofe in other Snails. 
a The entrance opening into the oppofite fide, 
and obliquely winding afcends towards the 
left. 
T AB. VIII. 
FIG. L 
The little Turbo. 
a The fhell of this Snail, with its windings 
turned the contrary way. 
6 Part of the body of the Snail creeping out of 
the thell. 
¢c Its two larger horns, in which the eyes are 
placed. 
B IyGie 1 
The fhell of the Snail reprefented, and of an ene 
larged fixe: 
a The entrance extended to the oppofite fide? 
6 The aperture of the pillar. 
cee The ridges, or ribs of the furface. 
(PG, OE 
The foell of the fmall Snail, found under the 
barks of the Willow. ~~ 
a The fhell of the fmall Snail; alittle flatted, 
B, I, Gi V4 
The fall water oval Snail, 
a The oval channelled thell of the Snail. 
6 The hinder part of the thell convolved into 
a double fpiral winding. 
Cc ¢ The 
