lap near the southern end of the Bontoc area, also, as he has
suggested, by the preponderance of very young men. The figures for
this group are as follows:

Observations on 18 Males

Average height 1.550 Range 1.46 to 1.630 "
length of head .186 .176 to .194 "
breadth of head .146 .138 to .153 "
bizygomatic width .135 .129 to .142 "
length of nose .041 .031 to .046 "
breadth of nose .040 .036 to .046 "

cephalic index 78.43
nasal index 99.8

Observations on 7 Females

Average height 1.486 Range 1.440 to 1.530 "
length of head .182 .171 to .191 "
breadth of head .143 .136 to .150 "
bizygomatic width .131 .127 to .136 "
length of nose .037 .033 to .042 "
width of nose .037 .036 to .038 "

cephalic index 78.59
nasal index 99.7

From these descriptive sheets it is obvious that each tribe is made
up of very heterogeneous elements, and each overlaps the other to a
considerable extent; however, the number of individuals measured is
sufficiently great for us to draw certain general conclusions from
the averages of each group.

It is at once evident that the differences between the Ilocano and the
Valley Tinguian are very slight, in fact are less than those between
the valley and mountain people of the latter tribe. The Ilocano
appear to be slightly taller, the length of head a little less, and
the breadth a bit more; yet there is an average difference of only
two points in the cephalic indices of the two groups. The only other
points of divergence are: the greater percentage among the Ilocano of
eyes showing the Mongolian fold, and the occurrence of straight hair
in about half the individuals measured. However, this latter feature
may be more apparent than real; for the Ilocano cut the hair short,
and a slight degree of waviness might readily pass unobserved.

As we pass from the Valley to the Mountain Tinguian, and from them
to the Apayao, we find the average stature almost constant, but the
head becomes longer; there is a greater tendency for the cheekbones
to protrude and the face to be angular, and there is a more frequent
development of t