430 A Study of the Nasal Bridge in the Anthropoid Apes 
group is leptogephyreal. In the same way the simotic nasal angle (/>' may be 
classed as simotic when under 32°, mesotic between 32° and 41°, and stenotic 
when over 41°. These limits should all be reduced by about 2° in classifying 
the female simotic nasal angle, which differs sexually by at least this amount 
from the male. We have accordingly the following table, of which we give illus- 
trations to indicate the type. The diagonal from simotic platygephyrosis to 
TABLE XXV. 
Value of Maxillary Nasal Angle (/>. 
Over 51° 
Simotic 
Leptogephyrosis 
e.g. Hylobates and 
natives of Sumatra 
Mesotic 
Leptogephyrosis 
e.g. Nubians 
Stenotic 
Leptogephyrosis 
e.g. Egyptians and 
Hindoos 
stenotic plagygephyrosis marks the homoclinic groups. The simotic leptogephy- 
rosis of the smaller gibbon and the stenotic platygephyrosis of the gorilla mark 
the heteroclinic extremes, which weaken the interracial correlation of <f> and 
Table XXVI qives the values of 
With the exception of the Gorilla, which is as in the case of the cuneal indices 
(p. 424) again anomalous, we see that there is intraracially a small negative corre- 
lation between flatness of the maxillary and flatness of the nasal bones. But 
inter racially it is otherwise ; there is quite a moderate degree of positive correla- 
tion and a flat nasal part of the bridge is found in the same races as a flat 
maxillary part. This is another instance of the reversal of intraracial by inter- 
racial correlation. 
(12) Discussion of Projections of Nasal and Maxillary Portions of Nose on 
the Base of the Nasal Bridge. 
Having studied the relation of the subtenses, the indices and the angles, we now 
rn to the chords. The niesodacryal chord is positively correlated with the simotic 
chord for all races except male Chimpanzees and the mixed data for Hylobates, but 
in both these cases the correlations are insignificant having regard to their probable 
errors; see Table XXII, p. 422. Both interracially and intraracially a broad maxillary 
-e- 
•V 
Ha 
S3 
< 
CO 
O 
a 
CO 
CD 
> 
Under 46° 
46° to 51° 
Under 
32° 
Simotic 
Platygephyrosis 
e.g. Chimpanzees 
and Negroes 
Simotic 
Mesogephyrosis 
e.g. Natives of 
Moluccas 
32" to 41° 
Mesotic 
Platygephyrosis 
e.g. Malays 
Mesotic 
Mesogephyrosis 
e.g. Ainos 
Over 41° 
Stenotic 
Platygephyrosis 
e.g. Gorillas 
Stenotic 
Mesogephyrosis 
e.g. English 
