198 DE. J. MUEIB ON THE FOEM AND STEUCTIJEE OF THE MANATEE. 



Fig. 23. Semidiagrammatic view of stomach as it appears on the cEsophageal or upper 



surface. 

 Fig. 24. A transverse section, about the middle of the cardiac glandular appendage, 



showing its irregular diverticulate central cavity and surrounding gland-cells. 

 Fig. 25. Piece of the small intestine, towards the duodenal end, showing form of rugse 



and P, Peyer's glands. 

 Fig. 26. Ditto, from the ileum, with glands {L) or crypts of LieberkUhn ? m, muscular 



coat. 

 Fig. 27. Portion of gut from near the rectum : L, glands, as above. 

 Fig. 28. Ileo-colic segment of the intestine, sliced open to show interior structure. 



il, ileum; c, colon, * its enlarged commencement; Coe', exterior, and Coe^, interior of 

 the caecal appendages ; gl, compound and sacculate ileo-colic valve-gland ; m, thick- 

 ening of muscular coat, the valve's wall. 



PLATE XXIV. 

 Fig. 29. Short deep muscles of the ventral surface of the neck; intervertebral exit of 

 the cervical and brachial plexus of nerves, and membranous chambers, postero- 

 base of skull. Eight side with upper layer and a partial outline of shoulder ; 

 left moiety, deeper view, and opened basicephalic chamber. 



S.mg. Insertion of serratus magnus into 

 Ch. Cephalo-humeral. [atlas. 



St.m. Tendinous insertion, sterno-mastoid. 

 S.h. Stylo-hyoid cartilage, cut cranial 



M.a.ma. Rectus capitis anticus major. 

 R.a.mi. Rectus capitis anticus minor, 

 ic', L(?, L&. Longus colli, its three parts. 

 PI. Rectus lateralis. 

 Sea. Scalenus. 



1, 2, 3, 4, 5, 6, 7, & 8, anterior spinal cervical nerves issuing from the intervertebral 

 foramina; PA, phrenic nerve; Fn, facial nerve at exit; na, posterior nares; ftf., 

 pterygoid process ; Pus., Eustachian sac, opened on left side. 



Fig. 30. Anterior segment of the body, with the limbs cut short. Dissected so as to 

 lay bare chiefly the heart, main vascular trunks, and complex rete mirabile of 

 the neck and upper limb, The sternum has been dragged outwards to the 

 left side, showing the under surface of its left osseous moiety and trifid 

 cartilages. The mammary gland and enlarged lymphatics partially occupy 

 the right side of the chest. On the left side of the neck the jugular veins 

 are intact, and the rete mirabile, cervical and axillary, superficially displayed. 

 On the right side a deeper ^'iew is given. The large venous trunks and 

 portion of the rete mirabile are removed, exposing the cervical and axillary 

 plexus of nerves. The digastric muscle is cut aM'ay, and the parotid gland 

 everted. 



Heart and vessels: — v, right, and ■«*, left ventricles; a, right, and a*, left auricle; 



