ae.
xi., Xiphisternum.

Figure 4. Vertebrae.--
At., Atlas.
Ax., axis.
c., [b.] centrum.
C.V., caudal vertebra.
c.v., [Cer.V.] cervical vertebra.
ep., epiphysis.
f.r., fused rib (in cervical vertebrae).
L.V., Lumbar vertebra.
m., metapophysis (of lumbar vertebra).
n.a., neural arch.
n.s., neural spine.
r., rib.
S.V., sacral vertebra.
[T.V., Thoracic.]
tr.p., transverse process.
v.a.c., vertebrarterial canal.
z., zygapophysis.

{Illustration: Diagram Sheet 5.}

Sheet 6.

The Skull of Canis.*--
1. Dorsal. 2. Ventral. 3. Right Lateral Aspect. 4. Section a little to the
left of the nasal septum. 5. Lower jaw (smaller) 6. Hyoid apparatus.

{Lines from First Edition only.}
-*A Fox in this case. The skull is quite like that of a Dog, but it has
the advantage of more distinct sutures between the bones.-

a.n., anterior nares.
a.s., ali-sphenoid.
b.h., body of the hyoid.
b.o., basi-occipital.
b.sp., basi-sphenoid.
c., condyle of the skull.
{c.1, c.4, canines.}
c.f., condylar foramen (for XII.).
c.h., cerato-hyal.
E.f., Eustachian foramen.
e.h., epihal.
-e.n., or a.n., the anterior nares.-
e.o., exoccipital.
eth., ethmoid.
e.t., ethmo-turbinal.
f., frontal.
f.l.a., foramen lacerum anterius.
f.l.m., foramen lacerum medium.
f.l.p., foramen lacerum posterius (for IX., X., XI.).
F.M., or f.m., foramen magnum.
f.o., foramen ovale.
f.r., foramen rotundum.
{i., incisors.}
ju., jugal.
m., molars.
m.t., maxillo-turbinal.
mx., maxilla.
na., nasal.
n.t., nasal turbinal.
o.f., optic foramen.
o.s., orbito-sphenoid.
p., or pal., palatine.
pa., parietal.
p.m., pre-maxilla.
p.m.1, p.m.4, premolars.
p.n., posterior nares.
p.sp., pre-sphenoid.
pt., pterygoid.
s.h., stylo-hyal.
s.m.f., stylo-mastoid foramen (for VII.).
s.o., supra-occipital.
sq., squamosal.
s.t., sectorial tooth.
t.h. thyro-hyal.
vo., -black line indicating position of- vomer.
z.p., zygomatic process of squamosal.

{Illustration: Diagram Sheet 6.}

Sheet 7

Figure 1. Striated muscle fibre (of the Rabbit), ruptured to show
sarcolemma.
e.p., its end plate.
K.m., membrane of Krause.
n., nucleus.
nv., nerve.
sc., sarcolemma.
s.e., sarcous elements.

Figure 2. Cardiac muscle.

Figure 3. Unstriated muscle fibres.

Figure 4. Diagram of the Skin.
b.v., blood vessel.
d., areolar tissue of the dermis (mesoblastic).
s.c., stratum corneum, and s.m., stratum mucosum of the
epidermis.
s.g., sweat gland.
t.c., tactile c