184 'Journal of Comparative Neurology and Psychology. 



'( facto ri US med- 



■MpstolfdctoriLLS 

 qr$niMle ceils 



\n.terniLndiLS 



Fig. 4. Through the olfactory bulbs at the level of the rostral eud of the 

 bulbulus accessorius. X 30. 



The layer of grauule cells is indicated by the stippled area, ventrally of 

 which is the layer of mitral cells (unimpregnated). The dorsal half of the 

 section is occupied by secondary olfactorj^ cells, two of which are imperfectly 

 impregnated. The fibers of the lateral secondary olfactory tracts are not im- 

 pregnated. They lie chiefly along the dorso-lateral border of the section ex- 

 ternal to the dotted line. The olfactory glomeruli are limited to the extreme 

 ventral part of the section. The nervus terminalis lies still farther ventrally 

 close to the meninges. 



