ENDOCRANIAL CASTS OF THE GIRAFFIDAE Ba 
complex conforms to Kapper’s description of the triradiata 
posterior (I. ¢., p. 309). 
Posteriorly the suprasylvian sulcus ends in the characteristic- 
ally ungulate fashion. There is no indication of an arcuate 
constellation as described in Giraffidae. 
f _R.desc.ss 
R.post.ss..._/ __S.suprasyly 
/ \ x S.ans. 
Siiiierhapeee ett Ry I eee S.Ps. 
-.-S.diag 
Deg pas ate ad . -R.ant.ectosylyv 
S. ob! Ne > x 5 === Scor 
a g = - - - F/- --S presyly 
oe 
H.post.ectosylv -* Sy 
10 
_S suprasyly 
S.lat ae 
_-..-9.cor 
R.desc.ss. _ ==Sh1=ey 
Ripostieae _ _S.diag 
S.obl. _ _ --- S.cor 
S.trirad.post.__) 
R. post. ectosylv.- ~ 
RY .-R ant.ectosylv 
s <S.presylv 
Ul 
Fig. 10 Right lateral views of the cerebrum of a young specimen of Bos taurus. 
Abbreviations as before. X #4. 
Fig. 11 Right lateral view of the cerebrum of Ovis aries (adult). Abbrevi- 
ations as before. > }. 
(2) Ovis aries (figure 11). Compared with the ox, the poste- 
rior lip of the pseudosylvian fossa is in general somewhat further 
operculated in the sheep, so that all but the extreme caudal tip 
of the posterior ectosylvian suleus remains hidden from the sur- 
face. Frontally also only a small part of the ramus anterior 
ectosylvii is exposed. The presylvian sulcus does not reach the 
rhinal fissure and is continuous frontally with the coronal. 
The diagonal with its quite constant accessory sulcus (9, 
p. 340) is present on both sides. On the right the diagonalis 
proprius joins the suprasylvian. 
The ansate joins the coronal suleus but does not link the 
latter to the suprasylvian as in the ox. The long descending 
ramus of the latter sulcus is closely related to a simple linear 
oblique sulcus. The suprasylvian itself is prolonged caudad in 
