n 8 E X P L A N A T I O N OF THE TABLES.
F i g . 2.
Shows tlie large ftone of the ear taken out of its fac.
F i g . 3.
Shows one of the fmall ftones of the ear taken out of the dilated portion^
where the anterior femicircular canal joins with the horizontal one.
F I G. 5.
Shows the fituation of the femicircular canals and large ilone of the ear, with
refpea to each other and to the brain, after cutting off the upper part of the
cranium.
A B, The lobes of the brain feen on their upper part.
C , The cerebellum.
D , The fpinal marrow.
E, A branch of nerves, which refemble our fifth pair.
F G, A perpendicular canal, conne£ting, or common to, the fuperior and inferior
femicircular canals of the ear.
H, The fuperior, and I tlie inferior, femicircular canal. At tliis place they
receive branches from nerves which refemble our fifth and feventh pairs.
K, The upper part of the fac which contains the large -ftouc of the car.
L , A nerve which refembles our feventh nerve, and likewife in a great meafure
fupplies the place of our eighth.
T A B L E
I
i
E X P L A N A T I O N OF THE T A B L E S . 11 9
T A B L E XL,
FIGURES I. and 2. of this Table reprefent thenofe; and figures 3. and 4. the
car of a Sturgeon.
F I G . I.
Reprefents the nofe on the right fide, as it appears without difleflion.
A , The upper and anterior opening into the nofe.
B, The under and pofterior opening.
C, A n intermediate covering of the nofe.
in FIG. 2.
The letters A and B are oppofed to the natural openings into the nofe.
C, The intermediate covering is cut and turned forwards.
D, The nofe is ful l y feen, confifting of nineteen doublings of membranes of
unequal length, which, lite «dll, iffue from one centre.
F I G .
Reprefents the outer fide of the three femicircular canals of the light ear, laid
in view by diflTeition.
A B , The anterior femicircular canal, in which there is a dilated portion
at B,
C D, The pofterior femicircular canal.
E F , The horizontal femicircular canal, in which there is a dilated part
at E.
F i g . 4.
Reprefents the joining of the three femicircular canals on the inner fide, or
fide next to the brain, and their communication with a large fac containing a
ftonc.
A B, The anterior femicircular canal, and B its dilated part.
C D , The poflerior femicircular canal, and D its dilated part.
EF, The horizontal femicircular canal, and E its dilated part.
G,
Si»