( 337 ) 



\nllis mosoi-liiiiica holiiiid llic origin ol" llir (iHjicloiy hitxM-cio mikI 

 heforo lli(> rcuioii of' llio pr.-U'oplic (=r oplic) recess. I propose l(» 

 (loiiojc il as \allis praeopliea, whereas Ills seems lo look upon il 

 as a coiiliiiiialioii of liis slalk-loM (iiiv sulcus lieiiiispliaoi-iciis) '). 

 It also is hroiiiilil alioiil iii(iepeii(leiill v of llie sli-iale(| coi-piis l)\- the 

 hiiliiiiiU' of Iho oltaclorv liihei-ch^ on one hand and of the region of 

 tli(^ chiasnia on Iho oilier. 'I'he nicli(> in llio \-enlricl(M'on'ospo)i(ling to 

 th(' olfacloi'v luliei'cle is desiLiiiale<| liv llis (al leasl in man) <as 

 the |)oslei-ior olfacloi'v l)i-ain in opposilion lo llie olfacloi'v lobe 

 s. sir., which he calls the anioi-ior olfaclory lirain. To the jtosterior 

 olfac'toiT brain he reckons parlicnlai'ly also Ihe snbslaiilia perforata 

 anterior. Af»;ainsl llie desiüiialion "poslerior olfaclory brain" 1 only 

 object llial it favours confusion willi llu^ lobiis pii-iformis, i. e. with 

 the posterior pai'l of llie rhinencc^phalon '■'). 



1) Gf. on this point al.>^o His, die Forniriihvicl<(Mnnir ilor menschl. Vorderliirns, 

 etc. Abh. d. math. phy.s. CI. d. Kg-1. S.-iclis. CIcs. d. Wiss. Pxl. IT), fig. 32, p. 72rj. 



~) C o n c e r n i 11 g t li p n o m e n c I a I u r c i ii I li is r o g i o ii I av o n 1 d 

 make I li e foil o w ing )■ c m a r k s. A I I r e r r li r a I p a r I s I li a I I i e 

 h a s a II y of t li e f i s s u i' ;i r ]i i n a I i s (= e e I o r li i ii a I i s = r h i n a 1 i s 

 1 a t e 1' a i 1 s of ni a n y a ii f li o r s) I d e n o I e as i' li i n e n c e j) li a 1 o n. 

 As 1 o 1) u s o I f a c t o V i u s (= ] n h n s o If a r t o rins a n t e r i o i- o f m a n y 

 authors) I designate in a p u )■ e I y t o p o g r a p li i e a I sense t li e 

 anterior ]i a r t of the r li i n e n c e \^ h a I o n a s far as it i s f| n i t e 

 s e p a r a t e d f r o ni I li e 1 o w e i' s n )■ f a e e o f t li e p a I li u ni. V or t li e 

 post e r i o r p a r t o f t li e r li i n e n r e p li a 1 o n llie designation 

 "1 b n s p i r i f o r m i s" might be reserved, b n I it i s m o r e a d v i s- 

 a b I e to give n p I li i s n a m e e n t i r e 1 y. Part of the 1 n I) n s o 1- 

 f a t o r i u s is c. o v e r e d \v i t h a m i e r o s c o p i c a 1 1 y s li a r p I v c li a- 

 r a c t e r i s c d for m a t i o n , i h e s o - c a 1 I e d f o r m alio h u I li a ris. 

 T ]i i s cover I design a t e as e a p p a o 1 f a e tori a. F r o m 1 li e 

 d e V e 1 p ni e n t a 1 point of v i e w it e o r )• v s p n n d s to the g a n g- 

 1 i n 1 f a c f o r i u m of His. The separation i\ Ï the 1 o b n s 

 o 1 f a c t r i u s and the pallium is e x r I ii s i v e 1 y it r o \\ g h t a b o n t 

 b y I li e f i s s n I- a )■ h i n a 1 i s (lateralis). H e n <■ e w e m n s t als o 

 r o g a r d as a part of Ihe f i s s n r a r h i n a 1 i s the s e p a rati n g 

 groove of olfactory 1 o 1) e a n d ï r o n t a 1 1 o 1) e which is 

 visible in the median plane, i. e. I a s s u m e t h a t 1 h e f i s s n r a 

 r h i n a 1 i s i n c i s e s at the front a s f a r as the median plane. 

 T he c a p p a o 1 f a c t o i- i a is marked o f f f r o m the f r e e s n r- 

 face, i.e. from the surface of the olfactory lob e I h a t is 

 not covered by the f o r m a t i o b u 1 b a ris, by a limiting 

 groove, t ii e margo c a |) p a e o I f a e t o r i a e. • \, a t e r a I 1 y it is 

 much more clearly marked than medially. In many ani- 

 mals (hedgehog, Echidna) the c a p p a o 1 f a e tori a covers 

 almost the whole o 1 f a c t o r y 1 o b e. T h e o 1 f a c lory tubercle is 

 also m a r k e (.1 off against its s u r i' o u n d i n g s by a shallow 



