332 
MR. W. K. PARKER ON THE STRUCTURE AND 
Explanation of Abbreviations. 
a.a.n. 
appendix alae nasi. 
i.c. internal carotid artery. 
a. cl. 
anterior clinoid wall. 
i.hy. interhyal. 
ale. 
aliethmoid. 
i.n. inner nostril. 
al.n. 
alinasal. 
i.p.rn. internal process of malleus. 
al.s. 
alisphenoid. 
i.tb. inferior turbinal. 
altb. 
alinasal turbinal. 
iv. investing mass. 
aq.v. 
aqueduct of the vestibule. 
j- jugal. 
a.sc. 
anterior semicircular canal. 
j.v. jugular vein. 
a.ty. 
annulus tympanicus. 
1 . lacrymal. 
au. 
auditory sac. 
l.c.i. long crus of incus. 
b.a. 
basilar artery. 
l.c.r. lateral cerebellar recess. 
b.br. 
basibranchial. 
l.l. lower lip. 
bJi., b.Tiy. 
basihyal. 
Ip. lip. 
b.o. 
basioccipital. 
l.s. lateral sinus. 
b.s. 
basisphenoid. 
lx. larynx. 
b.tr. 
basitrabecula. 
. m. mouth. 
c.a. 
concha auris. 
mb. manubrium mallei. 
c.c. 
common (auditory) canal. 
me. meniscus. 
cJi., cJiy. 
ceratohyal. 
m.e. meatus externus. 
cl. 
cochlea. 
m.eth. mesethmoid. 
: l 1, 2, &c. 
1st, 2nd, and following visceral clefts *. 
mJc. Meckel’s cartilage. 
cr. 
coronoid process of mandible. 
mJc.c. Meckelian commissure. 
ct. 
cutis. 
ml. malleus. 
c.tr. 
cornua trabeculae. 
mn. mandible. 
C 1. 
thalamencephalon. 
m.n. middle nostril. 
C 1“. 
hemisphere. 
m.ob. medulla oblongata. 
C 2. 
2nd cerebral vesicle. 
ms.py. mesopterygoid. 
C 3. 
3rd cerebral vesicle. 
m.tb. middle turbinal. 
cl. 
dentary. 
m.tr. middle trabecula. 
d.px. 
dentary part of premaxillary. 
m.ty. membrana tympani. 
e. 
eyeball. 
mx. maxillary. 
ejp. 
epiotic. 
mx.p. maxillo-palatine. 
e.n. 
external nostril. 
n. nasal. 
e.o. 
exoccipital. 
n.w. nasal wall. 
e.pg. 
external pterygoid plate. 
o.b. os bullae. 
eu. 
Eustachian tube. 
oc.c. occipital condyle. 
/• 
frontal. 
os. oesophagus. 
f.l.p. 
foramen lacerum posterius. 
ol. olfactory sac. 
f.m. 
foramen magnum. 
o.ob. os orbiculare. 
f.ov. 
fenestra ovalis. 
os. orbito -sphenoid. 
f-r- 
fenestra rotunda. 
o.v. ophthalmic vein. 
h.br. 
hypobranchial. 
p. parietal. 
7i.sc. 
horizontal semicircular canal. 
pa. palatine. 
by. 
hyoid. 
p.e. perpendicular ethmoid. 
* These may be counted from the lacrymal or first preoral, or from the tympanic or first postoral. 
