PLATE 3 
EXPLANATION OF FIGURES 
Figures of Heterodontus francisci (natural size). 
6 Lateral view of the cranium with articulation of first and second visceral 
arches. 
7 Median view of mandibular arch showing articulation. 
a.p., articular process of palato-quad- 
rate 
c-h., ceratohyoid 
c.l’., slip from palato-cranial capsular 
ligament : 
d.l. 1-2, first and second dorsal labial 
cartilages 
hl.p., hyal process 
hm., hyomandibula 
kb., mandibular knob 
l.cp., ligamentum complexum 
l.h-m., ligamentum hyoideo-mandibu- 
lare 
lL.hm-h., ligamentum hyomandibulo- 
hyoideum 
lL.km-m., ligamentum hyomandibulo- 
mandibulare 
l.h-m.g., ligamentum 
quadratum 
hyomandibulo- 
l.m., ligamentum mediale 
l.q-m.i., ligamentum quadrato-mandib- 
ulare internum 
md., mandible 
md.r., mandibular ridge 
0.p., optic pedicle 
p-q., palato-quadrate cartilage 
sp.c., spiracular cartilage 
s.p-s.l., superior postspiracular liga- 
ment 
tr.l.r., transverse lateral ridge 
tr.m.r., transverse median ridge 
v.l., ventral labial cartilage 
_ 483 
