STUDY OF PIG EMBRYOS. 



EC. 





L.V. 



N.cerv.i. 



Ao.D. 



Olf. 



P.M. 



FIG. 193. PIG, 12.0 MM. TRANSVERSE SERIES 5, SEC-HOX 292. 



', Descending aorta. Card, Anterior cardinal vein, car.in, Intern.-)! Carotid artery. cl.II, Second gill-clef' 

 EC. Ectoderm. H, Anlage of cerebral hemispheres. L.gr, Lachrymal groove. L.V, Lateral ventricle of 

 brain. W ?.',, \I;mdibular arch. MX, Maxillary process. My, Myotome. nch, Notochord. N.cerv.i, 

 i- irst 'cervical nerve. N.j, Facial nerve. A". 9, Glosso pharyngeal nerve. A r .icv Vagus nerve. A r .n, 

 Spinal accessory nerve. O.F,.()ral fissure or s[)ace MRwi-en .he head and mandibles. Olf, Olfactory pit. 

 Pk, Pharynx. P.M, Pia mater. Sp.c, Spinal cord. t< 22 di.-, 



f 



