188 



STUDY OF PIG EMBRYOS. 

 /■:,. sp.c. 



N.cerv. i. 





Fig. 117. — Pig, 12.0 mm. Transverse Series 5. Suction 292. 



Ao.D, Descending aorta. car.in, Internal carotid artery. ■/.//, Second gill cleft. Ec, Ectoderm. H, 

 Anlage of cerebral hemispheres. Jug, Jugular vein. L.gr, Lachrymal groove. L.V, Lateral ventricle 



Mandibular arch. Mx, Maxillary process. My, Myotome, itch, Notochord. N. 

 First cervical nerve. jV. 7, 1'acial nerve. N. q. Glossopharyngeal nerve. N.io, Vagus nerve. X.n, 

 Spinal accessory nerve. O.F, Oral fissure or space between the head and mandibles. Olf, Olfactory pit. 

 J'/i, Pharynx. P.M, Pia mater. Sp.c, Spinal cord. X 22 diams. 



