78 Proceedings of the Royal Physical Society. 
occipital bone, and well indicated by a furrow very clearly 
marked." If this statement be correct, the tribe whose 
crania were disinterred about the neighbourhood of Lake 
Titicaca are not singular in respect to this formation of the 
skull, as all the ancient Peruvians are said to have possessed 
it. The statements of Drs Bellamy, Tschudi, and Siguier 
Eivero are thus alluded to by Colonel Hamilton Smith, in 
his " Natural History of the Human Species,'' who says, — 
" If the typical Flatheads were not a distinct species of 
man, they were, at least, the oldest and first wanderers that 
reached the American continent f and adds in a note, that 
Kecent investigations, conducted by Sir Eobert Schom- 
burgk, show the Maopityan, or Frog Indian tribe, at the 
sources of the Corentyn, to be naturally flatheaded. Dr Lund 
states that he found some skulls in the interior of Brazil in 
a fossilised state, corresponding to those discovered near the 
Lake Titicaca. They were in limestone crevices, and mixed 
with the bones of different species of extinct animals, 
" proving," as Colonel H. Smith remarks, " both the remote 
age when this form of man already existed in America, and 
the extent of surface it is now known to have occupied." 
The skull in my possession appears to have belonged to 
a young person, the sutures being open and distinct, and 
only fourteen teeth being present in the upper jaw. The 
ossa wormiana extend in the line of the lambdoidal suture, 
from an inch above the posterior inferior angle of the pa- 
rietal bone, and are nearly an inch in breadth. The skull 
belongs to the brachycephalic type, and is somewhat prog- 
nathous. The occipito-frontal diameter is inches, the 
interparietal diameter is 5^- inches, and the vertical height, 
measured from the middle of the sagittal suture interiorly 
to the anterior edge of the occipital foramen, is about 5 
inches. The horizontal circumference of the skull, ex- 
tending from the glabella along the upper margin of the 
squamous suture and over the occipital protuberance, is 19^ 
inches. The skull, without the lower jaw, weighs 21^ 
ounces ; the cranial cavity is capable of containing 36^ 
ounces of millet seed, the anterior portion 10^ ounces, and 
the posterior 26 ounces, which is nearly in the ratio of one 
