FASCICULI MALATENSES 
151 
region is not nearly so abrupt as in typical brachycephalic skulls. The side 
walls of the cranium are slightly convex and the roof is flat* the sagittal ridge 
being feeble. There is a slight depression in the post-parietal region, embracing 
the sagittal suture in its main axis, and possibly of artificial origin, though it 
is a common feature in the skulls of all the wild tribes represented in our 
collection, and also in those of the Andamanese in the collection of the Edinburgh 
University Museum. The frontal longitudinal arc is considerably longer than 
the parietal. 
Norma lateralis. Prognathism is slight. The nasal bones are relatively 
flat, and the nasion is comparatively little depressed. The glabella and supra¬ 
orbital ridges are not prominent, and the forehead, though low, is fairly vertical. 
The roof of the skull is feebly arched. The occipital squama is inclined to be 
convex outwards, but does not form a definite boss, and the cerebellar part of the 
occiput, which is relatively of considerable extent, is convex downwards. The 
mastoids are fairly stout, but the zygomata are slender. 
Norma facialis . The face is broad and flat, the approximate maxillo¬ 
facial index being 46 ; but atrophy of the alveoli makes it difficult to 
obtain the measurements with exactitude. The external nares are very broad, 
the nasal index ( 59 ‘l) being strongly platyrhine. The floor of the 
nasal cavity is not separated from the upper jaw by a ridge, but there is no 
transverse depression In its place. The orbits are mesoseme, their index 
being 86'8, 
Norma occipitalis. The outline is somewhat rounded. The ridges and 
depressions seen in this view are not conspicuously developed, but the 
conceptacula cerebelli are protuberant. 
Sutures. The sutures, which have commenced to be obliterated at several 
points, are fairly complex, though the dentidilations are short. There is a 
small Wormian bone in each lambdoid suture. 
Jaws and Teeth. The lower jaw has atrophied considerably, owing to the 
absorption of the alveoli of the molars and premolars ; the same has occurred 
in the upper jaw. The palate is very long and narrow (dolichuranic), its 
index being 96*2. The third molar on the left side of the upper jaw has 
evidently persisted longer than the other teeth of the same part of the mouth, 
and was probably present at death ; there are indications that the corresponding 
tooth was never developed on the right side of the jaw. The teeth themselves 
have all disappeared. 
The skull exhibits marked microcephaly, its cubic capacity, determined with 
shot by Sir William Turner’s method, 1 being 1,150 c.c. It is phaenozygous, 
I. Repcrts Chatlenger r part XXIX, 18S4. 
