196 Journal of Comparative Neurology and Psychology. 



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Fig. 1. Transection tlirongli the middle of the right olfactory bulb of 

 a carp 50 cm. iu length. Weigert method. X ^"^ (Zeiss oc. 2, obj. AA, 

 reduced to two-thirds). Shows the uervus termiualis imbedded among the 

 fibers of the tractus olfacto-lobaris medialis. Most of the stippled periphery 

 is filled with the unmedullated fibers of the olfactory nerve which are end- 

 ing iu glomeruli iu this region. An especially prominent mass of such 

 fibers appears dorso-laterally forming a protuberance. The nervus termiualis 

 is lost a short distance rostrad of this level among the fibers of the olfactory 

 nerve; n. term., uervus termiualis; olf. nerve, olfactory nerve, fibers of 

 which are scattered about the periphery at the points noted ; rad. olf hit., 

 radix olfacloria lateralis; tr. olf. loh. iiied., tractus olfacto-lobaris medialis. 



