ANG 
sage, are only to be met with at particular 
seasons ; and others, though always con- 
fined to one piece of water, are nearly tor- 
pid daring the winter, and are found only in 
deep places. 
AN GUIS, in natural history, the Glow- 
worm, a genus of serpents : the generic 
character is, scales both on the abdomen 
and beneath the tail. There are, according 
to Gmelin, 26 species. This genus is easily 
distinguished, by having the abdomen and 
under part of the tail covered with scales of 
a simi'ar appearance to those on the rest of 
the animal, except that in some few in- 
stances they are rather larger. The body 
is of a shorter and more uniformly cylindric 
form than in the genus Coluber : the eyes 
are in general small, and the tail rather ob- 
tuse. N o poisonous species of anguis has 
yet been discovered. A. fragilis, or com- 
mon slow-worm, is found in almost all parts 
of Europe, in similar situations with the 
common snake, and is a perfectly innoxious 
animal, living on worms and insects. It is 
about 10 or 12 inches long : the tail measures 
more than half the length of the animal, and 
terminates pretty suddenly in a slightly acu- 
minated tip. The slow-worm is a viviparous 
animal, and produces occasionally anumerous 
offspring : like other serpents, it varies in in- 
tensity of colours at different periods, and 
the young are commonly of a deeper cast 
than the parent animal. The general mo- 
tions of the slow-worm are tardy, except 
when endeavouring to make its escape : it 
can, however, occasionally exert a consi- 
derable degree of swiftness, and can readily 
penetrate the loose soil in order to conceal 
itself from pursuit. They are often found in 
considerable numbers during winter, at 
some depth beneath the surface, and lying 
in a state of torpidity, and again emerging 
from then- concealments on the approach of 
spring, when they cast their skin, and recover 
their former liveliness. If struck with vio- 
lence, the body of this animal will break 
into pieces. A. corallina, or coral slow- 
worm, is a very elegant species, about 13 
inches long, and ofa considerable thickness : 
the scales are moderately large, and the 
head and tail are remarkably obtuse. It is 
a native of South America, where it is found 
in woods, and to prey on the larger insects 
as the scolopendrae, &c. : in colour it some- 
times varies ; a mixture of black being 
blended with the red on the sides. (See Plate 
I. Serpentes, fig. 5.) A. ventralis, or glass 
slow-worm, is a handsome species about two 
feet long : it is a native of North America, 
AN I 
and it takes its name from the circumstance 
of breaking to pieces in two or three places 
with a small blow of a stick, the muscles 
being articulated quite through the verte- 
bra;. A. Jamaicensis, or Jamaica slow- 
worm, found in Jamaica about the roots of 
decayed trees, near ants’ nests, &c. and 
though it has generally been deemed poison- 
ous, yet it is really innocuous : its colour is 
an uniform pale brown, with a kind of sil- 
ver y gloss on the scales, which are very 
smooth. 
ANGULAR motion, in mechanics and 
astronomy, is the motion of a body which 
describes an angle, or which moves circu- 
laily round a point. Thus a pendulum has 
an angular motion about its centre of mo- 
tion, and the planets have an angular mo- 
tion about the sun. The angular motions 
of revolving bodies, as of the planets about 
the sun, are reciprocally proportional to 
their periodic times ; and they are also as 
their real or absolute motions directly, and 
as their radii of motion inversely. 
Angular motion is also composed of a 
right-lined and circular motion, or in which 
the moveable body slides and revolves at 
the same time: such is the motion of a 
coach-wheel. 
ANGURIA, in botany, a genus of the 
Monoeeia Diandria class and order: calyx 
five-cleft: corolla five-petalled: pome infe- 
rior, two-celled, many-seeded. 
ANHV DRILE, in mineralogy, one of 
the sulphate tamily, found at Saiz on the 
Neckar, in Wertemberg. Colour smalt 
blue, which passes into a milk white. Mas- 
sive : not very brittle. Specific gravity 
2.94. It differs from cube-spar in colour, 
fracture, shape of fragments, and in having 
a higher specific gravity. 
ANIGOZANTHUS, in botany, a genus 
of the Hexandria Monogynia class and or- 
der; corolla six-parted, with unequal in- 
curved segments : stamina inserted in the 
throat of the corolla : capsule three-celled, 
many-seeded. There is only a single species ; 
a native of New Holland. The stem is’ 
leafy, covered at the top with reddish hairs : 
leaves linear: flowers umbelled: corolla 
clothed with reddish hairs. 
ANIMAL, in natural history, an organised 
and living body, endowed with the powers 
of sensation, and of spontaneous loco-motion. 
Some have defined animals from their loco- 
motion, as being capable of shifting from 
place to place, whereas plants adhere to the 
same subject. This property they assume 
as the great characteristic by which animals 
