. Bulletin of the Natural Histort Museum. Geology series. . CHURCHILL AND HOLLIDAY Table 1 Dimensions (mm) of the sixth cervical vertebra. Dorso-ventral diameter1 Superior external transverse articular diameter3 Superior internal transverse articular diameter1 Superior transverse articular diameter4 Inferior external transverse articular diameter5 Inferior internal transverse articular diameter6 Inferior transverse articular diameter' Spinal canal dorso-ventral diameter (M-10) Spinal canal transverse diameter (M-l 1) Spinous process length8 Spinous process angle1* Body ventral height
. Bulletin of the Natural Histort Museum. Geology series. . CHURCHILL AND HOLLIDAY Table 1 Dimensions (mm) of the sixth cervical vertebra. Dorso-ventral diameter1 Superior external transverse articular diameter3 Superior internal transverse articular diameter1 Superior transverse articular diameter4 Inferior external transverse articular diameter5 Inferior internal transverse articular diameter6 Inferior transverse articular diameter' Spinal canal dorso-ventral diameter (M-10) Spinal canal transverse diameter (M-l 1) Spinous process length8 Spinous process angle1* Body ventral height (M-l) Body inferior dorso-ventral diameter (M-5) Body inferior transverse diameter (M-8) () 5° () Fig. 1 Gough's Cave 1 sixth or seventh cervical vertebra at bottom of figure, articulated to four reconstructed vertebra above; lateral view; x 1. 'From the mid-ventral surface of the body to the dorsal tip of the spinous process. 2Maximum distance between the lateral edges of the superior articular facets. 'Maximum distance between the medial edges of the superior articular facets. ""Average of the external and internal transverse articular diameters of the superior articular facets. 'Maximum distance between the lateral edges of the inferior articular facets. 6 Maximum distance between the medial edges of the inferior articular facets. 'Average of the external and internal transverse articular diameters of the inferior articular facets. 8From the ventro-superior margin of the intersection of the laminae and the spinous process to the dorsal tip of the spinous process (not including the unfused tubercle). 'The angle between the central long axis of the spinous process and the horizontal plane of the superior surface of the body, taken in the median sagittal plane of the vertebra. of the superior surface of the corpus and making its identification more difficult). The first thoracic vertebra is preserved, an
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