26 Effie A. Eead 



"Eami porro isti copiosiora mox emittunt filamenta, quorum magna 

 pars nudo oculo conspicua, inter membranam pituitariam, & periosteum 

 septi narium a summo ad imum septum decurrunt. . . . Maiores vero 

 rami non intermisso per cribriformem laminam itinera continues cana- 

 liculos superiorum turbinatorum ingrediuntur, intra quos iterum, ac 

 saepe divisi, & ramosi porro pergunt late per turbinata ossa superiora 

 distribuendi. Quo in itinere, utpote canaliculorum quaniplures com- 

 municationem inter se alunt, crebrisque orificiis ad narium cavitatem 

 hiant; ita nervorum, de quibus loquimur, rami intra hos canaliculos 

 adhuc reconditi anastomosim, & plexuosas copulationes (t) inter de- 

 scendendum in vicem constituunt, frequentesque propagines extus per 

 patula canaliculorum orificia membranae pituitariae turbinata ossa 

 superiora vestienti largiuntur. . . . ]\Iedio modo se liabent, qui 

 per median! turbinatorum superiorum regionem f eruntur : nempe quo 

 ad numerum, crassitiem, & incessus rationem; in eo autem discrepant, 

 quod omnium huius provinciae longissimi sunt (x) quippe a summis 

 naribus ad imam usque oram turbinati medii pertingunt. . . . Sed 

 neque ad turbinatum inferius paris primi filamenta deduci plura sunt, 

 quae sin minus suadent, saltern dubitationi locum praebent vehementer. 

 . . . Keque enim ad organi olfactus sedem adscribendi sunt finus 

 pituitarii, quoniam olfactilis nervus membranae eas caveas vestienti 

 filamenta nullatenus tribuit." 



For Comparative Anatomy the statements of Milne-Edwards, Clie- 

 veau and Owen agree very closely with those in the works on human 

 anatomy. 



The following is a generalized statement by Owen: 



"The nerves are grouped in all Mammals into a set for the septum 

 and a second for the upper or ethmo-turbinals, a third or middle short 

 set being, in some, distinguished for the labyrinth or roof of the nasal 

 chamber. The branches of the second set, after expanding on the 

 ethmo-turbinals, usually converge to become connected with the lateral 

 nasal branch of the 'fifth.' Their mode of distribution is best seen on 

 the ethmo-turbinal : here they divide, subdivide, expand and anastomose 

 with each other, forming a reticular nervous expanse, with long and 

 narrow meshes, and becoming impacted in the central, or inner, layer of 

 the olfactory membrane." 



For the true relation of these nerve bundles see the body of this 

 paper, page 33 and Figs. 24-27. 



