PLATE IV. Longitudinal median sections of Vertebrate 

 brains corresponding to the first half of the series in Fig. 117 in 

 the text, [(b) and (c) after EDINGER.] 



(a). Selachian; (b). Teleost; (c). Amphibian. 



Color Scheme -.yellow, telencephalon; blue, diencephalon; red, mesenceph- 

 alon; green, metencephalon; brown, myelencephalon and cord. 



