No. 3.] MUSCLES AND NERVES [N AMIA CALVA. 593 
portio major respectively of the ophthalmicus superficialis tri- 
gemini of Schwalbe and Van Wijhe. 
a. Trigemino-Facial Ganglion. 
The trigemino-facial ganglionic complex, as commonly con- 
sidered, usually includes the profundus ganglion. As that 
ganglion is found, in Amia, as a wholly separate ganglion, the 
complex, in Amia, consists of a profundus ganglion and what 
will be called, in these descriptions, the trigemino-facial ganglion 
proper. As this last ganglion contains the so-called lateral 
elements of the facialis, it should, perhaps, not be assigned 
entirely to the trigeminus and facialis. 
In 12 mm. larvae the profundus ganglion lies in front 
of and internal to the anterior, upper end of the trigemino- 
facial ganglion proper, separated from that ganglion by a de- 
scending portion of the orbital vein or venous sinus. It has 
a long and delicate root running almost directly backward to 
the extreme lateral portion of the anterior surface of the 
medulla oblongata, where the fibres turn inward and backward 
and enter the brain as a distinct bundle having a somewhat 
deep origin. The root is entirely separate from the anterior, 
or trigeminal, root of the trigemino-facial ganglion, lying in 
front of, above, and internal to it, and separated from it by 
the orbital vein. 
The trigemino-facial ganglion proper consists of two dis- 
tinct or nearly distinct parts, the main ganglion and the 
ganglion of the ophthalmic and buccal branches of the facialis. 
The former, in the earliest larval stages examined, is a large, 
irregular mass of cells, separated imperfectly into three parts 
or regions, an anterior, a median, and a posterior, the anterior 
and posterior portions each being traversed by a large bundle 
of fibres. The anterior end of the ganglion has two projections, 
an outer one giving origin to the truncus maxillaris trigemini, 
and an inner one to the ramus ophthalmicus superficialis trige- 
mini. The latter, or inner end lies at a higher level than the 
outer one, running upward and forward in front of, and in a 
measure internal to the ganglion of the ophthalmic and buccal 
