64 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
apparently stop here, and a small group of sympathetic ganglion cells — 
is found at the point of juncture of the two nerves. These facts sup- 
port the conclusion that we have here a combined sympathetic and 
viscero-sensory rainus. 
The palatine ramus passes cephalad from the ganglion swinging in 
toward the median line (Plate 8, fig. 7). Its course is along the groove 
which marks the division between the proédtic and the basioccipital 
(Plate 1, fig. 3). It passes into the sphenoid and crosses the base of 
its process dorsally, being carried in an imperfectly closed foramen 
(Plate 6, fig. 17, pal). The palatine passes into a narrow space of the 
sphenoid and out again on the median side to assume a position just 
underneath the mucous membrane median to the basiptergoid process 
of the sphenoid (Plate 5, fig. 15). In its course cephalad it keeps along 
the dorsal side of the pterygoid near its median border, gradually 
taking a more lateral position, to the point where it bears the ganglion 
palatinum (Plate 3, fig. 7, gn. pal.). Throughout this portion of its 
extent it gives off no fibers for distribution. It receives (or gives off) 
the anastomosing branch connecting with V by way of the ramus to 
the palpebral muscle (Plate 3, fig. 6, dep. palp. if., see p. 50). This 
does not change the character of the palatine in any recognizable way, 
and there are no ganglion cells in connection with this anastomosis. 
The ganglion palatinum is a sympathetic ganglion, which appears on 
the main palatine ramus proximal to any terminal branches. It lies 
on the floor of the orbit ventral to the palpebralis muscle and marks 
the beginning of the infraorbital plexus between nerves V and VIL. 
A small number of medullated fibers are given off laterally, the main 
bundle dividing again just distal to the ganglion. The ganglion cells — 
are strongly grouped at the first division point and also extend along — 
the lateral branch for a considerable distance (Plates 2, 3, figs. 4 | 
6). From this point forward to the level of the ethmoidal ganglion — 
the palatine components are carried in rami which anastomose more or _ 
less with each other and with the infraorbital ramus of nerve V. | 
The infraorbital plexus consists of a number of anastomosing — 
branches spread out in the orbit on the dorsal side of the pterygoid 
and palatine bones, these branches connecting rm. palatinus VII with | 
maxillaris V (infra orbital portion). The posterior (proximal) limits of | 
this plexus are marked by the sympathetic ganglia of palatine VII and 
infraorbital V (Plates 2, 3, figs. 4, 6, 7, gn. pal. and gn if’ orb.). 
This plexus was studied both from series of sections and from 
dissections with a view to determining its constant features. ‘The | 
complete plexus was much better demonstrated by the latter method | 
