220 
pr.max.p., processus maxillaris pos- 
terior 
pr.max.p’., median extension of pro- 
cessus maxillaris posterior 
pr.odont., processus odontoideus 
pr.par., processus paroticus 
pr.pt., processus pterygoideus (of 
quadrate) 
pr.pt’., isolated anterior end of pro- 
cessus pterygoideus 
pr.ret., processus retroarticularis of 
Meckel’s cartilage 
prom.amp.a., prominence of anterior 
ampulla 
prom.amp.l., prominence of lateral 
ampulla 
prom.amp.p., prominence of posterior 
ampulla 
prom.coch., prominence of cochlea 
prom.r.ut., prominence of recessus 
utriculi 
prom.sac., prominence of sacculus 
prom.s-c.a., prominence. of anterior 
semicircular canal 
prom.s-c.l., prominence of lateral semi- 
eircular canal 
EDWARD L. 
RICE 
prom.s-c.p., prominence of posterior 
semicircular canal 
prom.ut., prominence of utriculus 
quad., quadrate 
r.amp.p., recessus ampullaris posterior 
r.sc.ty., recessus scalae tympani 
r.sc.ty.l., lateral aperture of recessus 
scalae tympani 
r.sc.ty.m., median aperture of recessus 
scalae tympani 
sep.i-o., interorbital septum 
sep.na., nasal septum 
sol.na., solum nasi 
sol.s-s., solum supraseptale 
sub.inf., subiculum infundibuli 
t.marg., taenia marginalis 
t.par.m., taenia parietalis media 
t.par.m'., isolated posterior fragment 
of taenia parietalis media 
tect.p., tectum posterius 
tend.ext., tendon of extracolumella 
trab., trabecula cranii 
v.jug., vena jugularis 
vert.1, atlas 
vert.2, epistropheus 
x, bar of questionable cartilage divid- 
ing fenestra prootica superior 
PLATE 1 
EXPLANATION OF FIGURES 
1 Stage 5. Dorsal aspect of chondrocranium, X 25+. Membrane bones 
represented on right side. 
