i Ne) i ee OG 
The method of watering it, requifite to keep it in good 
health. we) 
‘The method of extracting it from its fhell. 50 
The method, and beft time, of fending it abread. 52 
‘The beft method of diffe@tiing it. 53 
Covered Snailsfeem tohaveavery dull fight = 48 
Their food, and time of feeding. 49 
In what manner they breathe, and the fervice breathing 
does them. 50 
In what manner their progreffive motion is effected, and 
the method of obtaining a fight of it. GOs 51 
Their feafon for copulation, how long it lafis, and how 
often it returns. 59 
‘Their mutual copulation, in what manner performed. 
56, 56 © 
‘Thingsremarkable beforeand after theircopulation. 58, 59 
What liquors may bemadeufe of to injeé their veflels. 54 
‘Their foft and hard parts, four horns, lips, and mouth, 
perforation of the genitals, limbs, and its perforations 5 
verge or foot; blood; fhell, how to be broken off ; the 
horns are adorned with glandulous grains. 44. to 45 
Aorta. Ba: 
Brain, moveable backwards and forwards. 46, 60 
Its fituation, conftruction, and cleft for the paflage of 
the ftomach. 45, 60 
Heart, 50. Its fituation, parts, conflruction, valves, 
in form of a crefcent, 53. The manner of obtain- 
ing a good fight of the heart. 5 
Horns very fenfible. 49. How rolled out. 46 
How difpofed when drawn in. 76. What number ferve 
to drawthem in 7s. The mucous glands of the horns, 
and the mucus itfelf defcribed. 45 
Upper ones have eyes at their ends, 45. Are hollow, 
and for what purpofe 7b. Their extremities 7b. and 
f{maller nerves 42. Lower ones, and their nerves 74. 
‘The nature of the fkin under the verge 53 
‘The chyliferous Ducts 55 
‘The two falival duéts, and faliva Piso 0 
Gall no way bitter. 55 
Fringes perform the office of feet 50. Their con- 
ftruétion 7b. 63 
Excrements of what form, 50 
Genitals male and female 56. How difpofed after coi- 
tion 59. Parts common to both male and female geni- 
tals 56. ‘The particle in form of a chain 58 
‘The penis defcribed 56. Its mufcles and nerves ib. 57 
Its tranfverfe mufcle 56. Vas differens 48 
Spermatic veflels delightful eating S68 
The fituation and fize of the faid veflels 56 
‘The manner of demonftrating them ib. 
‘The ftructure of the tefticles, and the feed 57 
The uterus; its nerves and mufcles, conftruCtion, faft- 
ening, ligament 57. Difpofition of the ovary, 7. 
Blind appendage 57. Its alkaline bone defcribed, 7d. 
A differtation on the ufe of faid bone 58 
Situation, lobes, and veffels of the liver 
Its glandulous texture, colour, hardnefs, pulps, juice, 
external coat or fkin, and agreeable flavour. ib. 
The animal’s external lips; the teeth, and their muf- 
cles, with the expanfion of the teeth over the palate ; 
the palate itfelf; mouths of the falival ducts ; and in- 
ternal lips. : slags 
Verge, its cohefion, conftruction, figures, incifions, 
perforations, veins 49s 
‘The tongue, its ftructure; the cartilage, in form of a 
crefcent, that ferves to cover it; the mufcle ferving to 
draw in the tongue, palate, jaws, and brain; the in- 
dented extremity of the tongue 48 
Spinal marrow, its fituation 62, Conftruction; gan- 
glion, and mufcles ferving to move the faid ganglion 
backwards and forwards, with the nerves adminiftering 
to the faid mufcles. 60 
Mufculous membrane found under the fkin 45 
Covered Snails, the manner of feeing the mucus iffuing 
from the glands of their {kin ‘ es) 
The mutcles are ftrong 55. Haw they are inferted into 
the ftone or fhell 62. Three mufcles, ferving to thruft 
‘out the mouth, and parts of the jaws, 48. ‘Tranfverfe 
“4ndented mufcles of the belly 53. Mufcles of the uterus 
and fpinal marrow, 60, 61. Mufcles of the legs 5 
8 
. 4 
SPINAL MARROW, in large and fmall infe&ts, com- 
their conftruction and infertion 62. Of Mufcles of the 
lower horn 62. Mufcles of the upper horns, fer- 
ving to draw in the eyes 7b. Mutcles ferving to draw 
inthe jaws, and parts of the mouth, 7. Serving to 
move the verge, their infertion and courfe 7b. Serving 
to move and raife the middle of the body i}. Difference 
between the flefhy and tendinous parts of the mufcles 60. 
Nerves ferving to move the mouth and gullet 47 
Adminiftering to the parts of the jaws, mouth, and 
palate; opticnerves; nerves belonging to the lower 
horns; to the mufcles of the fkin of the head; nerves run- 
ning under the parts of the mouth and palate, and fub- 
fervient perhaps to the fenfe of tafte, nerves iffuing 
from the brain; from the fpinal marrow ; belonging fo 
the mufcles of the neck; to the fpermatic veflels ; to the 
mufcles that ferve to move the fides ; to the uterus, to ° 
the verge. 61, 60 
Origin of the merves from the brain, and their courfes 
46. ‘Their mufcular fheath and ligaments. 2d, 
‘The eyes where placed 45. By what contrivance the 
fight is performed 48. Optic nerve of the eye,-and its 
mufcle, 45. Its figure; coat called uvea; parts; three 
humours ; what end anfwered by the {preading of the 
mufcle over the coat; the eyes, ciliary ducts ; retina ; 
its pupil, not feen by the Author. 47, 48 
Many Naturalifts have attributed eyes to the horns, and 
again denied their exiftence. 45 
Lid, what itis? and its conftruCtion. 65 
The falt bone, perhaps, ferves to fhake the feed into 
the uterus. 64 
Eggs before copulation are very {mall. se) 
Mufcles ferving to move the foot, their conftrudtion 
and infertion, 62. 
Situation of the lime-bag, its colour, connexion, tex- 
ture, duct, ufe, and tafte. 545 55 
Its colour, nature, and fituation. 54 
Difference between the blood and the mucus. 4. 
The fhell exhibits marks, which like thofe on the horns 
of black cattle ferve to fhew the Snail’s age. 51 
The fhell is a true fkin, or ftony bone. 64, 65 
Swells, increafes, and hardens, likethe fhells of Crabs, 
and bonesof men 64. In what manner it grows 
2b. Its conftruction 63. Its pillar, and the perforation, 
of the pillar 7. It periofteum 64. Its various fizes. 
63 
Tube, common to the kidneys and uterus. 53 
Vena cava, and its branches. ' 
Stomach, its fituation, three coats, veflels, colour, 
the pylorus; fmall guts ; in what part of thefe the gall 
flows into them; exitus of the ftraight gut. 55 
Snail, the oval one. 69 
‘The pyramidal and cylindrical ones. 66 
The tubular one. 68 
‘The vine one. See covered Snail. 
SPIDERS, belong to the firft order of changes 20 
Have no antennz or horns, nor Scorpions neither 21 
See better than other infects, except the Dragon Fly 23 
See further particulars, 23. Po aw 
‘The Author never obferved that Spiders, however irri- 
tated, difcharged any virulent matter. 272 
Parts obferved by the Author. 24 
‘See further particulars. DBR DD DOIN, 
Various fpecies 23 
American Spider. 20 
‘The Holland Spinning Spider. ib. 
One from the Cape of Good Hope. ib. 
The crimfon Spider of Lifter. 24, 
The long-footed one. 21 
‘The Flea-Spider. A Defcribed. 21, 23 
‘Two fpecies of it. ae. 
The Hedge Spider, which carries its eggs about with 
i 2 
pared g1. Its origin, and all the nerves derived from 
it, feem to be moved by the irritation of the nerves 
alone. Po de ee 
SILK-WORM, falfely faid by Malpighius to have more 
hearts than one 111. Has twenty breathing-holes 180 
A defcription of its change, by Malpighius. P. II. 2, 3 
Fat, and fome other parts 136, 1275 138, 139 
Its fk 138. The bag, containing a glutinous mat- 
ter 
