THE FISSURA HIPPOCAMPI 
Pl.ch.vent.lat., plexus chorioideus ven- 
triculi lateralis 
Pl.ch.vent.quart., Pl.ch.v.quar., plexus 
chorioideus ventriculi quarti 
Pl.ch.vent.ter., plexus chorioideus ven- 
triculi tertil 
Pely.c.l., intermediate layer of mi- 
grating neuroblasts 
Post.hyp., Post.l.hyp., posterior lobe 
of hypophysis 
P.Ra., P.Rat., pouch of Rathke 
Prim.hip., primordium hippocampi 
p.t., pars tenuis of lamina terminalis 
P.vel.r., postvelar arches 
P vel.t., postvelar tubules 
Pyr.c.l., pyramidal cell layer 
Rec.inf., reeessus infundibuli 
Rec.mam., recessus mamillaris 
Rec.op., optic ventricle 
Rec.postop., recessus postepticus 
Rec.preop., recessus preopticus 
Reg.par.ar., region of the paraphyseal 
arch 
Reg.sept., region of the septum epen- 
dymale 
Rhom.fos., rhomboid fossa 
Sept., septum 
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Sept.epen., septum ependymale 
Sul.dors., suleus dorsalis thalami 
Sul.fim.den., suleus fimbrio-dentatus 
Sul.fu.pl.ch.vent.lat., suleus  futurus 
plexus chorioidei ventriculi lateralis 
Sul.lim., suleus limitans 
Sul.mon., suleus Monroi 
Sul.vent., sulcus limitans hippocampi 
Tel., telencephalon 
Tel.ch.tel.med., tela chorioidea telen- 
eephali medii 
Tel.evag., telencephalic evagination 
Tel.r.pl., telencephalic roof plate 
Te.pl.ch.vent.lat., taenia plexus chori- 
oidei ventriculi lateralis 
Te.pl.ch.vent.quar., taenia plexus chori- 
oidei ventriculi quarti 
Te.pl.ch.vent.ter., taenia plexus chori- 
oidei ventriculi tertii 
Thal., thalamus 
Tub.cin., tuber cinereum 
Tub.olf., taberculum olfactorium 
Undif f.den., Undif.fas.den., undiffer- 
entiated fascia dentata 
Vel.trans., velum transversum 
Ven.lat., Vent.lat., ventriculus lateralis 
Vent.tert., ventriculus tertius 
EXPLANATION OF SYMBOLS 
hippocamaus. 
fascia dentata 
area epithelialis 
subcortical olfactory centers 
septal nuclei 
sulcus limitans hippocampi 
THE JOURNAL OF COMPARATIVE NEUROLOGY, VOL. 34, NO. 1 
