c. 



Nch. 



N. 



N. 



N. 



k Syrn. 



FIG. 143. PIG. 20 MM. TRANSVERSE SERIES 59, SECTION 1253. 



arach, Arachnoid membrane. A.sul, Arteria sulci. cart' , cart", Cartilaginous anlages of elements of the 

 skeleton of the limb. Cm, Neurone layer of spinal cord. D.R, Dorsal root. EC, Ectoderm, epen, 

 Ependymal layer of spinal cord. G, Spinal ganglion, muse, One of the muscular anlages. N, N, N, 

 Nerves of the lumbar plexus. Nch, Notochord. Pen, Penis. Rect, Rectum. Sk, Anlage of the dura 

 mater. Sym, Sympathetic nerve. T, Tail. Ur, Urethra. V.arc, Vertebral arch. Vert, Vertebra. 

 V.il, Iliac vein. F./,"Border vein of the limb. X 22 diams. 



248 



