TIII-: /..i //;/,'.!/. r/-;.\TA'/r/.A'x 



855 



uniiniiiis than the ]>:irt in the Innly of the ventricle. f.'J) Partly covered by the 

 chorioid plexus is the hippocampus major, a prominent, sickle-like ridge i onvspond- 

 ing to the indentation of the hippocampal lissure. It begin- us n narrow ridge liehind, 

 :it t he end of the body of the \entricle, a,- the e\t en-ion of the posterior pillar of the 

 fornix. and expands in front as t he \ eiit ricuh.r surface of t he minis. Its surface is not 

 regular, lint shows a concave medial margin as distinguished from a wider, convex, 

 lateral surface. Its termination in front (/x.s /// /I/HM-HIH /</> is divided liy two or three 

 Hat . radial grooves into a corresponding number of short elevat ions known as the lii/i- 

 iliijitiitioiiK. It is covereil liy a thick stratum of white substance, the 



FIG. 637. DIAGRAMS OK LATKKAI, VIKW .\\i> Sn i n>\- <M mi: Xi < I.KI OF THE Conprs STRIA- 



1 1 \i WITH THK KIM;\M. ('M'.-CI.K (>\ii ; 



A and 15 below represent horizontal section.s alonu the- lines A .-unl B in the figure al-ove. 

 The figure aUo ihowa the relative position of the thalamus and the amygdaloid inn 



IM /.!//. M , /./ /.s 

 T1IM. AMI'S 



tBNTKULAH xr<i.i-:rx 

 ,vrr/./,r\ 



CACIIATI-: .vrr/./.7\ 

 TJtALAXlia 



CAVDATK XI'CI.Krs 



B 



IXTK11XM. 

 LEXTH-rr.M! M f/./..v> 



CAVDATK xrri I 



CAf/i.trt: M-I-I : 



fJfTERA'A I. I' A I'X I '!. /:' 



arising from its depths and continued mesially into the fimhria. (4) The 

 fimbria is so folded that its margin, tunia fnnhrin . lies in the cavity of the inferior 

 horn attached to the chorioid plexus and the thin, non-nervous floor of the chorioid 

 fissure. 



The caudate nucleus. As realised in the study of the lateral ventricle, the cau- 

 date nucleus is a comma-shaped mass of grey substance with a long, much-curved, 

 and attenuated tail. Its haul forms the bulging lateral wall of the anterior horn; 

 thence it proceeds backwards in the lateral wall of the body of the ventricle and, at 



collateral trigone, curves downwards and its tail becomes a median portion of the 

 roof of the inferior horn. It is separated from the thalamus adjacent to it by the stria 



