XV111 LIST OF ILLUSTRATIONS. 



FIG. PAGE 



cyclostome, a 'selachian, a ganoid, a bony fish, an amphibian 

 and a mammal 255 



128. Transverse section of the diencephalon of the rat at the 



level of the body of Luys. From Cajal 257 



129. Transverse section of the dorso-mesial portion of the posterior 



corpus quadrigeminum of the new-born dog. From Cajal. 259 



130. Transverse section of the anterior corpus quadrigeminum of 



the rabbit of eight days. From Cajal 260 



131. Lower part of the corpus geniculatum laterale of a new-born 



cat. From Cajal 262 



132. Nucleus of posterior commissure in Lampetra 266 



133. Transverse section through the corpora mammillaria of the 



sturgeon 270 



134. Transverse section through the inferior lobes of the sturgeon. 272 



135. Transverse section through the posterior commissure of the 



sturgeon 273 



136. Scheme of the connections of the mammillary tracts, nucleus 



habenulae and the nucleus dorsalis thalami. From Cajal. 274 



137. Sagittal section of the tuber cinereum of a new-born rat. 



From Cajal 275 



138. Sagittal section of the tuber cinereum of the rat of eight 



days. From Cajal 276 



139. A scheme to show the embryological relations of the nucleus 



habenulae and the inferior lobes in fishes 277 



140. Nucleus habenulae of the sturgeon 278 



141. Transverse sections through the nucleus habenulae and the 



facial lobe of a young Amia . . . . 279 



142. Transverse section of the habenular nuclei in the dog. 



From Cajal 280 



143. The efferent tract to the saccus vasculosus in the sturgeon.. 283 



144. A general scheme of the saccus apparatus 284 



145. A diagram of the fiber tracts in the forebrain of a cyclostome 



(Lampetra) 294 



146. An oblique section through the inferior lobes and forebrain 



of Lampetra 296 



147. A diagram of the fiber tracts in the forebrain of a selachian 



(chiefly after Kappers) 299 



148. A diagram of the fiber tracts in the forebrain of a bony fish 



(chiefly after Goldstein) 302 



