SERI MOTHER AND CHILD

Norma basalis—Contour almost round. Whole base symmetrical, except as noted below; the middle structures appear shortened antero-posteriorly, slightly more on the left than on the right; basilo-vomeric angle rather acute (100°); foramina of the base all spacious; the petrobasilar suture is large (average diameter, 5 mm.) and is throughout pervious. Superior dental arch regular and of medium thickness. Dentition incomplete—right upper wisdom tooth not fully erupted; left lower wisdom tooth wanting entirely. Denture fine and regular; no teeth decayed. Both upper first incisors absent.[243] Teeth set regularly in socket and of medium size. Palatine arch symmetrical. Shape of palate normal. Posterior nasal foramina oblong. Styloids small, shell-like, flattened.

Norma occipitalis—The posterior part of the skull is somewhat flattened. The sides of the surface present a pentagonal outline with rounded corners, the apex corresponding to the sagittal suture, or obelion. There is a slight asymmetry, the right side being somewhat flattened. Exterior occipital protuberance not well marked.

Norma verticalis—Outline an irregular ovoid, wider posteriorly and more prominent on the left and posteriorly. Slight symmetrical depression of the parietals, beginning about 1 cm. and ending 5 or 6 cm. behind the coronal suture and extending laterally from the sagittal suture to the upper temporal ridge.

Norma lateralis—Outline ovoid, larger posteriorly. Pterions en H, of medium breadth. Temporal ridges not very distinct. Parietal bosses prominent.

cc.
Skull capacity, Broca’s method1,545
Skull capacity, Flower’s method1,490
Antero-posterior diameter, maximum16.3
Lateral diameter, maximum14.4
Cephalic index, 88.3=Brachycephalic.[244]
Chin-bregma21.2
Chin-ophryon13.2
Alveolar point-ophryon8.6
Bizygomatic breadth, maximum13.0
Facial index98.5
Superior facial index (Broca’s), 66.1=Mesoseme.
Height of nose aperture5.4
Breadth of nose aperture 2.65
Nasal index, 49.0=Mesorhine.
Mean height of orbits3.80
Mean breadth of orbits3.95
Orbital index, 96.2=Megaseme.cc.
Mean depth of orbits4.6
Dacryon to dacryon2.3
Frontal diameter, minimum9.2
Frontal diameter, maximum (interstephanic)11.4
Biauricular diameter[245]12.3
Diameter through parietal bosses14.3
Bimastoid diameter10.55
Distance from superior alveolar arch to inferior occipital ridge14.35
Distance between supramastoid eminences13.9
Length of basilar process (notch of vomer to basion)2.95
Basion-bregma height13.45
Basion-obelion height? (obelion indistinct.)
Basion-ophryon14.0
Basion-inion8.1
Circumference, maximum49.4
Nasion-ophryon arc1.8
Nasion-bregma arc12.3
Nasion-inion arc30.0
Nasion-opisthion arc35.5
Pterion-bregma arc11.2
Arc external meatuses, over forehead29.2
Arc external meatuses, over frontal bosses30.4
Arc external meatuses, over bregma34.0
Arc external meatuses, maximum35.7
Arc external meatuses, over inion23.6
Temporal ridges to sagittal suture (stephanions-bregma), (arc) mean7.5
Lateral diameter of foramen magnum, maximum2.75
Antero-posterior diameter of foramen magnum, maximum3.60
Index of foramen magnum76.4
Length of hard palate, maximum4.6
Height of hard palate at first molars1.55
Breadth of hard palate at first bicuspids2.9
Breadth of hard palate at first molars3.55
Breadth of hard palate at third molars4.1
Height of posterior nares3.1
Breadth of posterior nares2.55
Index of posterior nares 82.2
Angle of mandibles114°
Length of mandibular rami9.55
Bigoniac diameter of mandibles9.85

The Vertebral Column

Cervical vertebræ—Number complete; characters normal. All cervical spinous processes bifid; vertebra prominens well defined. All epiphyses absent.

cc.
Transverse diameter of third cervical vertebra (between posterior tubercles of the pedicles), maximum5.05
Antero-posterior diameter of third cervical vertebra (body-spinous process), maximum4.20
Greatest lateral diameter of foramen, same vertebra2.15
Greatest antero-posterior diameter of foramen, same vertebra1.45
Height of body in center, same vertebra.90