. The Journal of comparative neurology and psychology. om eruti n. term l-riaUs Fig. 3. Tlirougli the olfactory bnlbs at the level of the rostral ends of therhiiiocoeles. x 30. The stippled area surrounding each rhinocoele indicates the extent of thelayer of granule cells, most of which are not impregnated in the few impregnated granules are drawn on the right side. Several typicalneurones of the mitral cell layer are drawn on the left side. Fibers of thetractus olfactorius pass dorsad from all parts of the mitral cell layer. Theglomerular layer lies farther ventrally, while the
. The Journal of comparative neurology and psychology. om eruti n. term l-riaUs Fig. 3. Tlirougli the olfactory bnlbs at the level of the rostral ends of therhiiiocoeles. x 30. The stippled area surrounding each rhinocoele indicates the extent of thelayer of granule cells, most of which are not impregnated in the few impregnated granules are drawn on the right side. Several typicalneurones of the mitral cell layer are drawn on the left side. Fibers of thetractus olfactorius pass dorsad from all parts of the mitral cell layer. Theglomerular layer lies farther ventrally, while the layer of fila olfactoriaoccupies the extreme ventral part of each bulb. The nervus terminalis hasseparated from the fila olfactoria on each side and lies between the latterand the meninges. 184 Journal of Comparative Neurology and Psychology. (factoriUS med-. ?MpstolfdctoriLLSqr$niMle ceils .terniLndiLS Fig. 4. Through the olfactory bulbs at the level of the rostral eud of thebulbulus accessorius. X 30. The layer of grauule cells is indicated by the stippled area, ventrally ofwhich is the layer of mitral cells (unimpregnated). The dorsal half of thesection is occupied by secondary olfactorj^ cells, two of which are imperfectlyimpregnated. 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 extremeventral part of the section. The nervus terminalis lies still farther ventrallyclose to the meninges. Herrick, Nnvus Tcrwinalis of Frog. 185
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