326 
A Study of the Negro Skull 
horizontal as in No. 83 on the R. Epipterics may be associated with the frontal 
processes of the squamous as in No. 66 on the L. 
The form of nose varies largely. In many cases, e.g. No. 73, the upper parts 
of the nasal processes of the superior maxillary bones and the nasal bones them- 
selves are of uniform width. In others the nasal bones are very much reduced 
and the nasal processes may even meet above them, e.g. No. 70. The form of nose 
in No. 83 is peculiar. Here the nasal processes of the superior maxillary bones 
nearly meet, and only a small pointed process of the frontal intervenes. This 
just meets the small triangular nasal bones (13 mm. long and 10 mm. wide 
at edges) which are nearly horizontal. 
Ossicles and wormians are often of considerable interest ; thus in Fig. (i), 
p. 327, a tracing is provided of a posterior sagittal ossicle occurring in No. 82 
and in Fig. (ii), p. 328, we have the large paired ossicles of the lambda (pre- 
interparietals) occurring in No. 88. Both these crania are female. 
Turning to the Gaboon 1864 series, we note several instances of the "metopic 
crest" or median frontal crest of Schwalbe. This is associated with bregmatic 
eminence in certain cases, and then the crania have a peculiar formation re- 
sembling in transverse section that of the Eskimo* (e.g. No. 86, Table III. B). 
A good many instances of local metopic eminence also occur (e.g. No. 13, 
Table III. A). 
Fig. (iii) is a tracing of a marked irregularity in the posterior portion of the 
sagittal suture which seems worthy of graphic reproduction. 
A marked feature of both the Congo and Gaboon series is the drawing or 
filing of the incisors. 
Classifying our peculiarities as in previous papers we have the following 
results : 
(i) Peculiarities of Form. 
Post-coronal depression occurs in : Gaboon 1864 series in three females 
(10, 54, 74) and in ten males (13, 14, 25, 28, 32, 62, 65, 67, 40 A. and a skull 
without number marked as (?)); Gaboon, 1880 in one male (3) and one female 
(37). In the Congo series it occurs in five males (28, 34, 50, 51, 57), seven 
females (65, 76, 77, 82, 84, 85, 90) and one non-adult (12). It thus does not 
appear in the Negro as in the European -f to be a markedly female character; it 
occurs in about 12 °/ 0 °f female and 14% of male negro crania. In the case of 
the English crania (Whitechapel) post-coronal depression or constriction occurred 
in 20 % °f female and 11 °/ o of male crania. 
Flattening of the Obelion seems very frequent in the negro skull and passes 
into depression. In Gaboon 1864 it occurred in 13 males (11, 27, 28, 30, 33, 45, 
47, 50, 57, 61, 65, 67, 79) and 14 females (4, 10, 12, 17, 21, 22, 24, 38, 39, 46, 48, 
* See Biometrika, Vol. vm. p. 181. 
t Macdonell, Biometrika, Vol. in. p. 218. 
