276 Description of two additional Crania of the 
not able to find any indications of the ascending portion of 
the intermaxillary bone, which articulates with the nasals, 
until led by Professor 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 margin, 
the edge of the process was easily detected, it not having be- 
come coossified in that region with the adjoining bone. 
The extension of the intermaxillary upwards, as far as the 
ossa nasi, so as to form the lateral walls of the external nasal 
orifice, aS was indicated in a specimen of Chimpanzée, exa- 
mined by Professor Owen, is still obvious in a young skull of 
the same species in my possession, where it reaches the 
nasals by a slender and pointed process. The enlargement 
of this process in the Engé-ena,* so as to form an extensive 
articulation with the nasal bones, inasmuch as it is a repeti- 
tion of what exists in the lower quadrumana, and nearly all 
the mammalia, must be regarded as an index of degradation. 
Ossa Nasi.—Professor Owen, in his Memoirt on the Enge- 
ena, in speaking of the sutures between the nasal maxillary 
and intermaxillary bones, says, ‘‘ It is remarkable, indeed, 
since these sutures remain so distinct in the adult female 
skull, and the two adult male skulls, in the Bristol Museum, 
that no trace of them should have been detected in either of 
the four skulls taken to America by Dr Savage, in which the 
ossa nasi are described as being firmly coossified with each 
other, and the surrounding bones” (the concluding words of 
the above sentence he does not quote, viz., ‘‘ but their out- 
line is sufficiently distinct’’). In the cranium brought by Dr 
Perkins, the consolidation of these bones is equally complete, 
and their‘outline is but indistinctly traceable. 
In the crania formerly described, the ossa nasi form, on 
the median line, a sharp elevation or crest ; in the specimen 
figured by Professor Owen, (Plate LXII.), this is represented 
by a more rounded and convex ridge, and, thus offering a 
feature of approximation to the human structure, which is 
* This is very distinctly shewn in Pl, UXII. of Professor Owen’s Memoir, 
t Op.-Cit.,_..420. 
