NERVUS TERMINALIS IN AN INFANT , 351 



the projection apparatus and a common hand lens substituted 

 for the objective. The chief nerves and other prominent struc- 

 tures were then sketched from alternate sections and the picture 

 completed under higher powers of the microscope for each slide 

 at a magnification of seventy diameters. These tracings were 

 transferred by carbon paper to a single chart from which a 

 photograph was taken to reduce it to ten diameters. From this 

 a drawing was made for figure 1, which is partly diagrammatic. 



Figure 1 shows the ganglion terixdnale and the peripheral 

 rami of the n. terminalis of the right side as seen from the median 

 plane projected on the olfactory bulb, the sectioned lamina 

 cribrosa and several related structures in the nasal septum and 

 overlying mucosa. As in the rabbit (Huber and Guild '13), 

 the peripheral rami of the n. terminalis lie next the cartilaginous 

 septum deep to most of the vessels and other structures of the 

 nasal mucosa. Centrally the ganglion terixdnale lies median 

 to the olfactory bulb embedded for the most part in the dura 

 lateral to the crista galli. 



The ganglion terminale, as in the rabbit (Huber and Guild 

 '13), is a nerve plexus of six or eight ganglia interlaced jn all 

 directions with nerve fibers. The overlying portion of the brain 

 was somewhat broken and disturbed in the technique but it is 

 thought the natural relations of the components of the ganglion 

 terminale are preserved in the surrounding dura. A slight 

 contraction is indicated by the wavering uncertain course of 

 the rather fine nerve fibers as compared with the stouter periph- 

 eral fibers under the nasal mucosa which seem fairly well 

 stretched and straight, perhaps on account of the pressure disten- 

 tion of the injection of this erectile-like tissue. In this instance 

 a single strand composes the central root of the ganglion terminale 

 which could be traced proximally about one-third the distance 

 to the optic chiasm. The brain is displaced here in this prepara- 

 tion and the root was lost before it unites with the brain. The 

 slender root was not sufficiently well impregnated to show fibers 

 clearly. No ganglion cells were found in its course. Few of the 

 cells in the ganglion terminale were impregnated sufficiently to 

 follow their nerve processes. Two such are shown in figure 4. 



