OEIGIN OF T]IE COEPUS CALLOSUM. 



69 



ExplaHation of reference-lettei 



The significance of tlic reference-letters a, h, c, d, a, ^, y, 



a. I. Anterior limit of the " gyrus subcallosus.''' /. 



ali\ Alveus hippocampi. 



ciny. Cingulum. I.e. 



ciny' . Longitudinalfibresin the alveus hipjjocanipi l.v. 



adjacent to the cingulum. n.a. 



C.I). " Commissura dorsalis." n.c. 



CD.' Dorsal limb of the " commissura dorsalis." n.f.d. 



c.d". Ventral limb of the iMetatherian type of n.l. 



" commissura dorsalis." o.b. 



c.e. Capsula externa. o/;/. 



c.f. Columna fornicis. o.tr. 



c.i. Capsula interna. p. 



cm. Commissura mollis. p.a. 



c.r. Corona radiata. 



est. Corpus striatum. PJ/-f- 



c.v. " Commissura ventralis." pyr. 



d.f. Uesceudiug hippocampal or fornix-fibres. 



e. Epithelial fold roofing the third ventricle. r.o. 



e.o.t. External olfactory tract. s. 



f.d. Fascia deutata. sept. 



f.h. Fissura hippocampi. s.^r. 



fi. Fimbria. s.l. 



fi. The remains of the fimbria intermingled s.m.t. 



with fibres of the commissura dorsalis. spl. 



fix. The " subsplenial hippocampal flexure." s.r. 



f.r. Fissura rhinalis. s.t. 



g.h. Ganglion habenulte (and stria meduUaris s.t'. 



thalami). 



hip. Hippocampus. s.t". 



hip' . " Supracommissural hippocampus." sub. 



hip". "Precommissural hippocampus." t. 

 hip'". Stratum zonale of the " precommissural 



hippocampus" lying upon the surface im- t.o. 



mediately above the stratum zonale [vd v. 3. 



molecularej of the fascia dentata [f.d.'). x. 



i. " Indusium vermn." 



i.l.s. Internal limiting sulcus of the tuberculum y. 



olfactorium {t.o.). 



•s in tlie Jigitfcs. 



h is explained in the text. 



" Longitudinal association bundles " of the 

 hi[i2i{icampus. 



Lamina cinerca. 



Lateral ventricle. 



Nucleus amygdalae. 



Nucleus caudatus. 



Nucleus fasciae dentatae. 



Nucleus lenticularis. 



Olfactorj' bulb. 



Optic nerve. 



Optic tract. 



General cortex or pallium. 



"Precommissural area" or "corpus prm- 

 commissurale." 



Pyriform lobe. 



Layer of pyramidal cells of the hippo- 

 campus. 



Recessus ojiticus. 



" Commissure-bed." 



" Septum pellucidum." 



Stratum granulosum of the fascia dentata. 



Stratitm lacunosum of the hippocampus. 



Stria medullaris thalami. 



Splenium of the corjjus callosum. 



Stratum radiatum of the hippocampus. 



Stria terminalis. 



The crossing fibres of the stria terminalis 

 entering the " commissura ventralis." 



The uncrossed part of the stria terminalis. 



Subiculum cornu ammonis. 



"Temporal pole" of the cerebral hemi- 

 sjjhcre. 



Tiiberculum olfactorium . 



Third ventricle. 



MeduUated nerve-fibres 

 stratum lacunosum. 



" Tract us hippocampi ad pallium." 



going to the 



