BUREAU OF AMERICAN ETHNOLOGY
SEVENTEENTH ANNUAL REPORT PL. XVI

GROUP OF SERI BOYS

Dorsal vertebræ—Number complete; characters absolutely normal. Resemblance to lumbar processes begins with tenth dorsal vertebra; a number of the epiphyses of the various processes either imperfectly united or detached; body epiphyses absent.

cc.
Antero-posterior diameter of body of sixth dorsal vertebra, maximum2.55
Lateral diameter of body of sixth dorsal vertebra, maximum2.90
Height of body in center1.67
Separation of transverse processes5.63
Edge of upper articular processes-tip of spinous processes5.50
Breadth of foramen, maximum1.60
Length of foramen, maximum1.50

Lumbar vertebræ—Number complete; characters absolutely normal. Only disk epiphyses detached.

cc.
Antero-posterior diameter of body, maximum3.12
Antero-posterior diameter of whole vertebræ, maximum7.10
Lateral diameter of body, maximum4.55
Lateral diameter of transverse processes, maximum7.10
Height of articular processes, maximum4.33
Height of body in center, maximum2.20
Antero-posterior diameter of canal, maximum1.50
Lateral diameter of canal, maximum2.10

The Sacrum

Aspect normal with the following exception: There are distinct intervertebral disks between the different segments (5 segments); there are deep lateral incisures in places where the lateral processes unite, and the fourth and fifth segments are entirely separated (in one piece) from the upper three (four small spots of coossification along the posterior border of the articulation are visible). The articular processes of the first and second sacral segments are similar in form to the lumbar, and form open articulations. There is a large foramen situated below the spinous processes of the first and third segment, and a smaller beneath the second. Coccyx absent. Curvature medium.

cc.
Breadth of the sacrum, maximum10.5
Height of the sacrum, maximum11.2
Index of the sacrum93.7