Fig. 20 Thews it with it’s fide towards the e ye; one o f the
wheels in this pofition appears to lie confrderably below the
other.
Fig. 6 and 16 reprefent two of thefe creatures in the poftures
they are often feen in when the wheels are not out, but the fiibril-
Ise are vibrating quickly.
Fig. 2, it is feen with the body nearly drawn into the abdomen;
at Fig. 21 it is ftill further drawn in ; at Fig. 22 as it appears juft
as the tail is drawn in ; at Fig. 23 in a globular form, but ftill adhering
by the tail.
Sometimes, when in the maggot form, it rolls it’s head and
tail together, without drawing them into it’s body; it is repre-
fented in this ftate at Fig. 14,
Mr. Baker has alfo defcribed three other fpecies, one o f which,
that differs only from the preceding in having a very long tail, is
xeprefented at Fig. 7, Plate XXVI. A.
Fig. 11 is another kind, with cruftaceous fpiculse at the forepart
; within this, at c, an opake oval body may be feen, which ‘
has been taken for an egg.
Fig. 3 is another kind; it has two projefiing points from the
“tail, and the head furnifhed with a number o f fibrillae.
Fig.
M i c r o s c o p i c a l E s s a y s , 633
Fig. 13 reprefents another fpecies, defcribed by Spallanzani.
Fig. 46, 47, 48, 49, Plate XXVI. reprefent the wheel animals,
feen and delineated by Mr. Müller, a the head, b the eyes, c a
fmall horn, d the rotatory organ, e the tail, f the points o f the
tail.
326. Vorticella Fureata.
Vorticella cylindrica, apertura integra, cauda longiufcula
bifida. Cylindrical vorticella, the aperture undivided, the tail
rather long, and dividedinto two parts.
- A cylind'ric body, with a rdtatdry organ, or row o f hairs, at
the apex; the tail divided into two parts, a little turning inwards.
When at reft, it joihs the fegments o f the tail ; but
when in motion, it feparates them. Generally found in common
water.
327. Vorticella Catullus. Fig. 50, Plate XXVI. '
Vorticella cyjindracea, apertura inutica, cauda per brevi, re-
flexa, bicufpi. Cylindrical vorticella, the aperture plain, the
tail Ihort, bent back, and divided into two points.
It is a little thick animalculurti, mufcular, folding itlelf up, of
an equal breadth throughout, the body disfigured by longitudinal
folds, winding varioufly; the anterior part, or head, con netted
to the body by a little neck, it/>ccafionalIy manifefts a very minute
rotatory organ. The tail (e) is Ihort, terminating in two
4 H very