OF THE SKULL IK LEPIDOSTEUS OSSEUS. 
491 
List of Abbbeviations. 
The Roman figures indicate nerves or their foramina. 
ag. 
Angular. 
al.s. 
Alisphenoid. 
ar. 
Articular. 
ar.c. 
Articular cartilage. 
a.s.c. 
Anterior semicircular 
au. 
Auditory capsule. 
au.f. 
Auditory fenestra. 
b.a. 
Basilar artery. 
* / 
b.br. 
Basi-branchial. 
b.hy. 
Basi-hyal. 
b.o. 
Basioccipital. 
b.pg. 
Basipterygoid. 
C\ 
Fore brain. 
C 3 . 
Mid brain. 
C 3 . 
Hind brain. 
c.br. 
Cerat o-bran chi al. 
c.hy. 
Cerato-hyal. 
cl. 
Cleft. 
cr. 
Coronoid. 
cr.c. 
Coronoid cartilage. 
c.tr. 
Cornua trabeculoe. 
d. 
Dentary. 
e. 
Eye. 
e.br. 
Epi-branchial. 
e.hy. 
Epi-hyal. 
ep. 
Epiotic. 
et.n. 
Ethmonasal. 
f 
Frontal. 
fo■ 
Fontanelle. 
g.p. and br.p. Gill processes. 
h. 
Heart. 
h.br. 
Hypo-branchial. 
h.hy. 
Hypo-hyal. 
Tim. 
Hyomandibular. 
hm.c. 
Hyomandibular facet 
dyle. 
Timf. Hyomandibular fenestra. 
h. s.c. Horizontal semicircular canal. 
i. hy. Inter-hyal. 
inf. Infundibulum. 
i.op. Interopercular. 
i. tv. Intertrabecula. 
j. J ugal. 
l. eth. Lateral ethmoid. 
m. Mouth. 
m. c.g. and m.g. Mucous gland. 
mk. Meckel’s cartilage. 
mn. Mandible. 
ms. pg. Mesopterygoid. 
mt. pg. Metapterygoid. 
mx'., mx." Maxillary. 
my. Myelon. 
n. Nasal. 
nc. Notochord. 
ol. Olfactory capsule. 
op. Opercular and opisthotic. 
op. p. Opercular process. 
os. f Orbito-sphenoidal fenestra. 
ot. p. Otic process. 
p. Parietal. 
pa. Superficial palatine. 
pa.s. Parasphenoid. 
p.br. Pharyngo-branchial. 
p.cl. Posterior clinoid. 
pd. Pedicle. 
pg. Pterygoid. 
pnl. Pineal gland. 
p.ob. Preorbital. 
p.op. Preopercular. 
p.pg. Palato-pterygoid. 
p.px. Palatine process of premaxillary. 
pr.o. Prootic. 
