DEVELOPMENT OF THE SKULL IN THE LACERTiLIA. 637 
Ji.br. 
Hypo-branchial. 
pa. 
Palatine. 
h.c. 
Head cavity. 
p.cill. 
Pedical of allantois. 
h.hy. 
Hypo-hyal. 
pa.s. 
Parasphenoid. 
h.s.c. 
Horizontal semicircular canal. 
p.b.c.f. Posterior basicranial fontanelle. 
hy . 
Hyoid arch. 
pcd. 
Pericardium. 
i.c. 
Internal carotid artery. 
p.e. 
Perpendicular ethmoid. 
i.n. 
Internal nostril. 
P-f 
Prefrontal. 
inf. 
Infundibulum. 
pg- 
Pterygoid. 
i.ob. 
Infra-orbital. 
ph. 
Pharynx. 
i.o.n. 
Interorbital notch. 
pi. 
Pineal gland. 
i.st. 
Infra-stapedial. 
p.p. 
Pars plana. 
i.tb. 
Inferior turbinal. 
pro. 
Prootic. 
iv. 
Investing mass. 
p.s. 
Pre-sphenoid. 
f 
Jugal. 
p.s.c. 
Posterior semicircular canal. 
l. 
Lachrymal. 
pt.l. 
Pectoral limb. 
I.c. 
Lachrymal canal. 
pt.o. 
Post-orbital. 
to . 
Mouth. 
pv.l. 
Pelvic limb. 
Mk. 
Meckel’s cartilage. 
px. 
Pre-maxilla. 
mn. 
Mandible. 
pg- 
Pituitary body. 
m.p. 
Muscle-plates. 
g- 
Quadrate. 
m.st. 
Medio-stapedial. 
s.ag. 
Sur-angular. 
m.tr. 
Middle trabecula. 
s.mx. 
Septo-maxillary. 
m.ty. 
Membrana tympani. 
s.n. 
Septum-nasi. 
mx. 
Maxilla. 
s.o. 
Supraoccipital. 
mx.p. 
Maxillo-palatine. 
s.ob. 
Superorbital. 
n. 
N asal. 
sp. 
Splenial. 
nc. 
Notochord. 
sq. 
Squamosal. 
nf 
Nasal floor. 
s.st. 
Supra-stapedial. 
nfp. 
Naso-frontal process. 
*.t\ 
Fust supra-temporal. 
n.g. 
Nasal gland. 
s.t\ 
Second supra-temporal. 
n.p. 
Nasal passage. 
st. 
Stapes. 
oc.c. 
Occipital condyle. 
st.h. 
Stylo-hyal. 
ol. 
Olfactory sac. 
st.m. 
Stapedius muscle. 
ol.c. 
Olfactory cartilage. 
t.pa¬ 
Transpalatine. 
olf 
Olfactory fenestra. 
ir. 
Trabeculae. 
op. 
Opisthotic. 
trc. 
Trachea. 
o.s. 
Orbito-sphenoid. 
u.l. 
Upper labial. 
ot. 
Otoconia. 
V. 
V omer. 
p. 
Parietal. 
vb. 
Vestibule. 
N.B.— 
-The palatal membrane bones and the prefrontals were coloured in the 1; 
paper “ On~the Snake’s Skull; ” they are not in this. 
