. Evidence as to man's place in nature . People having such skullswere called by Retzius * dolichocephalic The most cursory glance at the side views of these two skullswill suffice to prove that they differ, in another respect, to avery striking extent. The profile of the face of the Calmuckis almost vertical, the facial bones being thrown downwardsand under the fore part of the skull. The profile of the faceof the Negro, on the other hand, is singularly inclined, thefront part of the jaws projecting far forward beyond the levelof the fore part of the skull. In the former case the skull issaid
. Evidence as to man's place in nature . People having such skullswere called by Retzius * dolichocephalic The most cursory glance at the side views of these two skullswill suffice to prove that they differ, in another respect, to avery striking extent. The profile of the face of the Calmuckis almost vertical, the facial bones being thrown downwardsand under the fore part of the skull. The profile of the faceof the Negro, on the other hand, is singularly inclined, thefront part of the jaws projecting far forward beyond the levelof the fore part of the skull. In the former case the skull issaid to be orthognathous or straight-jawed; in the latter, * In no normal human skull docs the breadth of the brain -case exceed itslength. it7 it is called prognathous,^ a terra which has been rendered^with more force than elegance, by the Saxon equivalent,— snouty/ Yarious methods have been devised in order to express withsome accuracy the degree of prognathism or orthognathismof any given skull; most of these methods being essentially. Fig. 28.—Oblong and prognathous skull of a Negro; side and front of the natural size. L 2 148 modifications of that devised by Peter Camper, in order toattain what he called the facial angle. But a little consideration will show that any facial anglethat has been devised, can be competent to express thestructural modifications involved in prognathism and orthog-nathism, only in a rough and general sort of way. For thelines, the intersection of which forms the facial angle^ aredrawn through points of the skull, the position of each ofwhich is modified by a number of circumstances, so that theangle obtained is a complex resultant of all these circum-stanceSj and is not the expression of any one definite organicrelation of the parts of the skull. I have arrived at the conviction that no comparison ofcrania is worth very much, that is not founded upon the estab-lishment of a relatively fixed base linCj to which the measure-ments, i
Size: 1226px × 2038px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublisherlondonwilliamsandn
