36 J. Wyman on the Engé-ena. 
by the prominent malar bones when the skull is seen in profile, but 
as was the case in those discovered by Dr. Savage, the nasal bones 
are wholly, and the orbit in part brought into view. In none 
of them is it more excluded than in the first figures of our me- 
moir. The great ridges above the orbits, which are so widely de- 
veloped in 7. niger, are still more so in the present species, an 
in the specimen now under consideration sustain the former state- 
ments with regard to them. Prof. Owen remarks in connection 
with them, “the prominence of the whole supra-orbitar ridge 
reaches its maximum in the present species and forms the most 
marked distinction in the comparison of its skull. with that of 
man.” (Memoir, p. 405. 
Aulinel —I have shown ina former communication from an 
examination of several crania of the Chimpanzée, that nearly all 
the sutures are completely obliterated early during the adult pe- 
riod.* From acareful examination of the six crania of the Engé- . 
ena to which I have had access, there is every reason to believe that 
an early coosification takes place in them also. In the skull now 
under consideration, which it is to be remembered, has not long 
d the adult period, the frontal, the sagittal, the coronal, the 
squamous portion of the temporal sutures, all those in the tempo- 
ral fossa as well as the transverse portion of the lambdoidal are 
no longs persistent. The crania which have been examined by 
Pro or some of them at least, indicate an opposite state 
of rime To ascertain, therefore, the value of cranial sutures 
as specific signs, it is quite obvious, that a large number of crania 
of different ages must be critically examined. 
Inter-mazillaries. —T hese bones so important as zoological in- 
dications are completely codssified with the maxillaries and with 
each other. No indication of asuture exists between them and 
the last mentioned bones either on the external surface below the 
nasal opeuings, or in the roof of the mouth. I was not able to 
find any indications of the ascending portion of the intermaxil- 
lary bone which articulates with the nasals, until led by Prof. 
Owen’s description to make a more careful search. Although 
externally there was no mark which would lead an anatomist to 
infer its existence, yet within the nasal cavity at a short distance 
from its margiu, the edge of the process was easily detected, 1 
not having become coéssified in that region with the adjoining 
ne. 
The extension of the intermaxillary upwards as far as the ossa 
nasi, so as to fon the lateral walls of the external nasal orifice, 
restate all caalanmteneeioeric EON ens cts aac nee 
* * Boston Kosch of fe Tiel Ay 
