134 



CHARLES BROOKOVER 



than two or three in any given group. Perhaps the total num- 

 ber posterior to the olfactory bulb does not exceed thirty in 

 adult man. A few were found well within the confines of the 

 nerve, the whole width of which is shown in figure 2. More 

 frequently they are near the boundary of the nerve, as has fre- 

 quently been remarked for them in various vertebrates. In all 

 cases noted there is a capsule about the individual nerve cell 

 and in some cases the cells somewhat similar to the sheath cells 

 elsewhere found in the nerve were found participating in the 

 make-up of the cell capsule. 



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Figs. 2 and 3 Drawings from camera lucida outlines to give the relations 

 of the sheath cells and ganglion cells to the nervus terminalis at about the middle 

 portion of its extent from the olfactory bulbs posteriorly, lying immediately 

 external to the pia mater. X 450. 



We are scarcely able to determine the posterior limit and 

 brain connection of the nerve by gross dissection in situ with 

 the aid of the hand lenses at our disposal, but my assistant, Mr. 

 Dickinson, who has so kindly made some dissections of the nerve, 

 has been able to show that in the cases examined the nerve breaks 

 up into two strands in the region over the medial olfactory striae 

 and some of the fibers seem to enter the brain substance in this 

 region not far from the anterior median margin of the trigonum 

 olfactorium. Sections are now being made to determine, if pos- 

 sible, whether all or a part of the fibers enter and in what rela- 



