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terminates in the cartilago triangularis. If one prepares the cartt. 
alares separately, and spreads them out, one sees that the cartilago 
triangularis extends between them as front edge of the septum nasi 
and protrudes a little to the front. Cercopitheci of which I examined 
several specimens are of exactly the same structure as these described 
Macacus. : . 
If now types with a distantia internarina “mediocrement épaisse” 
are compared with these two types, one sees that the American 
monkey always represents the platyrrhine type, the monkey of the 
Old World always the cathyrrine type. Is. Grorrroy Sr. Hiiarre 
mentions Semnopithecus and Miopitecus (talapoin) as monkeys of the 
Old World with a rather large distantia internarina. In Semnopithecus 
namely in a specimen of Lophopithecus melalophos (s. Semnophitecus 
melalophos) I found the greatest distantia internarina of monkeys of 
the Old World. In the mentioned Lophopithecus this distance was 
0.6 em., over against 0.55 cm. in an Ateles, to be mentioned 
by-and-by. Yet one recognizes by the prominence of the whole nose, 
by the absence of the separation of the nostrils with regard to the 
upper-lip, by their regular narrow oval shape the catarrhine nose. On the 
other hand the nose of an examined Afeles grisescens with a distantia 
internarina of 0.55 em, with the sharply limited nostrils opening 
spontaneously indicates the platyrrhine monkey. The physiognomy 
of _Nyetipithecus trivirgatus, likewise mentioned by Is. Gxorrroy 
Sr. Hrrairw, is greatly different from that of the other Platyrrhini. 
The animal has a prominent nose and nostrils directed downward 
and sideways. A fossa internarina lies on the inferior part of the 
nose. The distance between the upper part of the nose and the rim 
of the upperlip is short. The nosirils have for the rest the sharp 
limitation of Platyrvhini. 
With the prepared nose the distinction of the two forms is also 
always possible. With Semnopithecus the nostrils do not lie — as 
with Macacus -- any longer on the oral but on the lateral extremity 
of the cartt. alares, they are however not enclosed in a labial direction, 
but a little crus mediale extends into the septum mobile. The cartilago 
alaris of Platyrrhini is stronger and more curved than that of 
Catarrhini. 
The shape of the nose in the different tribes of Platyrrbini is 
little divergent. Only Nyctipitheeus forms an exception. With Ateles 
the distantia internarina seems to vary considerably. So Is. G. Sr. 
Hizaire mentions Lagothriz Humboldt, belonging to the same family, 
as a specimen with rather small distantia internaria ; it was not the 
case with the specimen that I examined. Of Catarrhini some species 
et ee 
