Chapter XV: Munsee Crania: Wormian Bones; Bregma and “inca” Bones

LEGEND:
A = Temporo-occipital
B = Temporo-parietal (squamo-mastoid angle).

-------------+----------+----------+----------+----------+----------
| 8 males |12 females| | 8 males |12 females
Total number+-----+----+-----+----+According +-----+----+-----+----
present | |Per | |Per | to | |Per | |Per
|Cases|cent|Cases|cent| sutures |Cases|cent|Cases|cent
-------------+-----+----+-----+----+----------+-----+----+-----+----
None | 3 | 38 | 4 | 33 |Coronal | 1 | 12 | — | —
One | 3 | 38 | 1 | 8 |Sagittal | — | — | — | —
Two | 1 | 12 | 1 | 8 |Lambdoid | 4 | 50 | 6 | 50
More than two| — | — | 5 | 42 | (A) | — | — | 6 | 50
Inca bone | — | — | 1 | 8 | (B) | 2 | 25 | 2 | 17
Bregma | 1 | 12 | — | — | — | — | — | — | —
(fontanel) | | | | | | | | |
bone. | | | | | | | | |
-------------+-----+----+-----+----+----------+-----+----+-----+-----

BREGMA AND INCA BONES

Among the 20 crania in which conditions with respect to these facts could be ascertained, there was found one bregma or fontanel bone (3 × 3.1 cm.), and one of the so-called Inca[44] bones (diameter, 8.3 × 3.5 cm.). There is nothing especially noteworthy in these occurrences, both of which, particularly the Inca bone, are of the nature of developmental anomalies.

[44] The term is used merely for convenience.

_Pterions._—Among the 19 Munsee skulls in which the pterions could be determined there was no case of temporo-frontal contact. In all instances the pterion was of the H type, predominantly narrow in the males and predominantly medium to broad in the females.