1888. ] 99 [Stowell. 
and simplicity, e.g., the dorsal rami are laterad and the terminal filaments 
are dorsad of the line of origin, which relation is not shown. 
Acc. Accessions from the N. accessorius to the N. vagus, etc. Acro- 
mio-trapezius, the three rami to the M. acromio-trapezius. 
Clavo-mastoideus, ca., the caudal ramus of the clavo-mastoid nerve. 
Clv.-mas. ce., the cephalic ramus of the same. Clavo-trapezius, the two 
principal rami to the M. clavo-trapezius. Orv., cervical myelic nerve. 
Hi., the hiatus trapezii. Inf., the ganglion inferius. or ganglion of the 
trunk of the N. vagus. Jug., the G. jugulareof the same nerve. Plexus, 
the gangliform plexus of the Glosso-pharyngeus, the Vagus, the Accesso- 
rius, the Hypoglossus, and the Sympathic nerves, Pl. Crv., the cervical 
plexus from which the accession is given to the N. accessorius near the 
hiatus. Spino-trapezius, the rami given to the M. spino-trapezius. Spl., 
the branch to the M. splenius. Ster.-mas., ramus to the cephalic extremity 
of the M. sterno-mastoideus. Ster.-mas.ce., ramus to the same. Ster.- 
mas., dors., ramus to the dorsal border. Ster.-mas., ven., ramus to the 
ventral border of the same muscle. 
BIBLIOGRAPHY. 
. 
For bibliography consult the Trigeminus Nerve in the Domestic Cat. 
T. B. Stowell. Proceedings of the American Philosophical Society, Vol. 
Xxili, pp. 459-478, 1886. Also, The Facial Nerve in the Domestic Cat. 
T. B. Stowell. Proceedings of the American Philosophical Society, Nov. 
5, 1886. 
The Hypoglossal Nerve in the Domestic Oat. By T. B. Stowell, A.M, Ph.D. 
(Read before the American Philosophical Society, March 2, 1888.) 
The reasons for presenting this contribution to comparative neurology 
have been given elsewhere. (The Facial Nerve in the Domestic Cat. Pro- 
ceedings of the American Philosophical Society, Nov., 1886.) The prep- 
aration of specimens and the magnifying powers used are described in the 
Same paper. 
NERVUS HYPOGLOSSUS. 
Synonymy.—N. hypoglossus ; N. lingualis medius ; Par nonum; N. 
loquens ; Hypoglossal nerve ; Gustatory nerve ; Ninth pair of nerves, 
General Characters.—The N. hypoglossus is the motor nerve of the 
tongue and of muscles that move the hyoid bone. By virtue of its rela- 
tion to the tongue it is directly concerned in mastication, since by the 
Movements of the tongue successive morsels of food are thrust between 
the teeth or are moved preliminary to deglutition. Its function is fur- 
ther shown by those mammals whose food is largely liquid and is secured 
