The =mylo-hyoideus= is well developed.
The =stylo-hyoideus= is very slender, and is inserted into the body of
the hyoid bone: it is not perforated by the digastricus.
[Illustration:
FIG. 230.—SUPERFICIAL MUSCLES OF DOG, AFTER REMOVAL OF PANNICULUS
CARNOSUS.
_1_, Levator nasolabialis; _2_, levator labii superioris proprius;
_3_, dilatator naris lateralis; _4_, _4′_, buccinator; _5_,
retractor anguli oris s. risorius; _6_, zygomaticus; _7_, malaris;
_8_, masseter; _9_, digastricus; _10_, scutularis; _11_, other
auricular muscles; _12_, parotido-auricularis; _13_, mylo-hyoideus;
_14_, sterno-hyoideus; _15_, sterno-thyroideus; _16_, splenius;
_17_, lumbo-dorsal fascia; _18_, rectus abdominis; _19_, obliquus
abdominis externus; _19′_, aponeurosis of preceding; _20_,
intercostal muscle; _21_, sacro-coccygeus accessorius; _22_,
sacro-coccygeus superior; _23_, sacro-coccygeus inferior; _24_,
great trochanter; _25_, jugular vein; _a_, _b_, _c_,
brachiocephalicus; _d_, clavicle; _e_, _f_, trapezius; _g_, serratus
cervicis; _h_, omo-transversarius; _i_, latissimus dorsi; _k_,
posterior deep pectoral; _l_, supraspinatus; _m_, _m′_, deltoid;
_n_, infraspinatus; _o_, triceps, long head; _o′_, triceps, external
head; _p_, brachialis; _q_, extensor carpi radialis; _r_, gluteus
medius; _s_, gluteus superficialis; _t_, _t′_, tensor fascia latæ;
_u_, sartorius; _v_, biceps femoris; _v′_, fascia lata; _w_,
semitendinosus; _x_, semimembranosus; _y_, sartorius; _z_, gracilis;
_26_, pronator teres; _27_, flexor carpi radialis; _28_, flexor
carpi ulnaris; _29_, tibialis anterior; _30_, popliteus; _31_,
_31′_, deep digital flexor; _32_, superficial digital flexor; _33_,
gastrocnemius; _34_, spine of scapula; α, parotid gland, with α′,
its duct; β, submaxillary gland; δ, submaxillary lymph glands; η,
parotid lymph gland; ζ, inferior buccal glands. (After Ellenberger,
in Leisering’s Atlas.)
]
The hyoideus transversus and =omo-hyoideus= are absent.
The =sterno-thyro-hyoideus= is large and arises chiefly on the first
costal cartilage.