ENDOCRANIAL CASTS OF THE GIRAFFIDAE 343 
above mentioned distortion, the volume of this cast would at 
least equal if not exceed that of okapi. 
On account of asymmetry the following measurements may be 
compared only approximately with the similar measurements 
recorded for the giraffe and okapi. 
The greatest transverse diameter of the cerebral portion of the 
cast in 96 mm. From the pontine surface to the highest point 
over the vermis area the distance is 60mm. From the frontal to 
the occipital pole of the cerebral portion, the maximum length 
is 110 mm. The greatest interfloccular diameter is 57 mm. 
Brain stem, cerebellum and basis cranu. In its cerebellar por- 
tion this cast resembles that of okapi, and like the latter there is 
evidence here of ossification having occurred in the dura to some 
extent in the region of the junction of the falx and tentorium. 
The presence of a well marked ‘‘fossette cerebelleuse moyenne”’ 
is indicated by the prominence of the interfloccular mass in the 
median plane. There is but little trace of the definite furrows 
separating this median prominence from the lateral portions of 
the interfloccular mass so obvious in the okapi. 
The olfactory bulbs are pedunculated as in the okapi, and 
project a considerable distance beyond the frontal pole of the 
cerebrum. . 
It has already been noted, that the configuration of the ven- 
tral area is altered to some extent, but most of the landmarks 
of this region may still be recognized. 
In figures 7 and 23, the protuberance marking the site of the 
right optic foramen is quite evident. Caudad from this certain 
elevations indicate the position of the emerging divisions of the 
trigeminal nerve. Between the protuberances which correspond 
to the foramen lacerum orbitale and the foramen ovale respec- 
tively on the right side an irregular elevation occurs which sug- 
gests the presence of a foramen rotundum. Though not so evi- 
dent on the left, this possibility at least may not be excluded, from 
an examination of the cast alone. The presence of two separate 
foramina in the great wing of the sphenoid however, in any of 
the modern Ungulata vera, if it ever occur, must be a somewhat 
rare condition as may be judged from the following. 
