148 
HORN EXPEDITION—ANTHROPOLOGY. 
found it as high as 73°, and as low as 46° 50' in the skull of an adult female with 
the alveolar point and incisor teeth perfect. Here this extreme alveolar prog¬ 
nathism was supplemented by a very striking degree of “ dental prognathism,” 
the anterior projection of the tips of the obliquely-directed median incisors beyond 
the alveolar point being as much as 5 mm. 
The palatomaxillary index is tolerably high, and may be correlated with the 
moderately low gnathic index in the same skull. Turner has already drawn 
attention to the connection between these factors. 
The narial indices are just within the platyrhine category, and correspond 
pi’etty closely with Turner’s average, which, however, was exceptionally low as 
compared with the averages of other observers. 
Addendum. 
Since the above report was written I have had an opportunity of examining 
a third skull collected by the Horn Expedition. It was marked as from George 
Gill Range. As it was considerably damaged I shall not give any detailed 
account of its characters. The cubic capacity could not be determined with 
certainty owing to imperfection of the base, but was approximately 1200 c.c. or 
just under. 
The glabello-occipital diameter was 182 mm. and the maximum transverse 
128 mm., giving a cephalic index of 70-33. The basi-bregmatic diameter was 
133 mm,, giving a vertical index of 73-07. This skull does not therefore exhibit 
the platycephalic character shown by the other two skulls, but is “ metrio- 
cephalic ” (Turner) or “mesoseme” in regard to this index. The “cephalic” 
index is, as in the others, markedly dolicho-cephalic. 
