DE. J. MURIE OX THE FORM AXD STRUCTURE OF THE MANATEE. 



195 



Muscles of the Body and Tail. 



Sj).d. Spinalis dorsi+ Levator caudte in- 



ternus, Lei. 

 L.d. Longissimus dorsi+ Levator caudse 



externus, Lee. 

 S]). Spleuius; Co. Comi)lexus. 

 Tz. Trapezius; Rh. Rhoraboideus. 

 S.l, S.l*. Sacro-lumbalis. 

 M. External intercostals. 

 E.o. External oblique. 



L.cd. Lumbo-caudalis. 

 Se. Sacro-coccygeus. 



P.c\ ) Different portions of the panniculus 

 P.c^. carnosus muscle; including the 

 P.c^ platysma myoides, or transverse 

 P.c-'. j nuchal portion of the panniculus. 

 La.d. Latissimus dorsi. 

 f. Dorsal layer of fat. 



Muscles of the Head. 



Te. Temporalis; ffr. Auditory canal. 



O.p. Orbicularis palpebarum. 



L.l.s.a.n. Levator labii superioris alsequse 



L.s.p. Levator labii superioris proprius. 

 D.l.i, D.l.i*. Depressor labii inferioris. 

 D.a.o. Depressor anguli oris. 

 Pel Mandibular portions of panniculus. 



I.sp. Infraspinatus. 



J). Deltoid. 



T\ T^. Triceps (first and second portions) 



T.ma. Teres major. 



B.a. Brachialis anticus. 



E.md. Extensor minimi disriti. 



Muscles of the Pectoral Limb. 



I PI &c. Palmaris longus &c. 



Fig. 9. 



Sl.&E.c.r.l. Supinator longus and extensor 

 carpi radialis longior. 



E.c.d. Extensor communis digitorum. 



E.c.u. Extensor carpi ulnaris. 



E.p.i.p. Extensor primi internodii poUicis. 

 Under surface, showing the superficial muscular layer of the right half of the 

 body, and dissected deeper parts of the left moiety. The letters used in 

 fig. 8 are applicable to similar parts exposed or cut short in the ventral 

 aspect. The following muscles, vessels, &c., besides are seen partly un- 

 covered. 



R.ah. Rectus abdominis. 



E.o. External oblique. 



I.o. Internal oblique. 



Tra. Transversalis. 



Is.c. Ischio-coccygeus. 



Ifc. Infracoccygeus. 



P.ma, Pma*. Pectoralis major. 



P.mi. Pectoralis minor. 



A, anus ; V, vulva ; PI, pehdc bone ; 



C.h. Cephalo-humeral. 

 St.m. Sterno-mastoid. 

 S.hy. Sterno-hyoid and Sterno-thyroid. 

 T.hy. Thyro-hyoid. 

 S. Subscapularis. 

 Pi. Digastric. 

 Ma. Masseter. 

 I L.l.i. Levator labii inferioris. 

 Ah. Bete, mammary arteries as a rete mirabile; 



C and /, carotid artery and jugular vein ; Ax.Bete, axillary plexus of vessels ; tr, 

 trachea ; M.gl, mammary gland ; P.yl, parotid gland ; Sw.gl, submaxillary gland. 



