SOCIETY OF THE UNIVERSITY OF ABERDEEN. >2:> 



In all the crania the maximum breadth lies above the parieto- 

 squamous suture. In all the skulls the Stephanie diameter is greater 

 than the minimum frontal diameter, as is also the asterionic diameter. 



Cranial Index. In the eight male skulls this index ranges from 

 sri to 92 - 3, with a mean of 85'3. The mean index for the two 

 female skulls is 82 - 8. The corresponding indices for modern Scottish 

 skulls are 77 '4 and 77 "2 respectively. Turner ' has given statistics 

 of seventeen Bronze Age skulls the average cranial index of twelve 

 skulls was SI - 4, while in other five it was 74. So far we cannot 

 find a record of a Scottish cranium with a cranial index so high 

 as 92 - 3. All the cist skulls are brachycephalic, with the exception 

 of one female skull, and of the ten skulls six are hyperbrachyeephalic. 



Horizontal Circumference. -The range of variation in this measure- 

 ment is remarkably small the mean horizontal circumference for seven 

 male skulls is 52;V1 mm., and for two female skulls 501 mm. The 

 corresponding measurements for modern Scottish skulls are 531 mm. 

 and 506 mm. 



Total Stxj it-till- Circuinfeiwice.In five male skulls this varies 

 from 491 mm. to 531, the average being 515 - 6 mm. ; in one female 

 skull this measurement is 488 mm. These measurements are almost 

 identical with the corresponding measurements of modern Scottish 

 skulls. 



In five out of the eight male skulls the frontal arc is longer than 

 the parietal arc ; in the two female skulls the frontal arc is also the 

 longer. In all the skulls the occipital arc is distinctly shorter than 

 the frontal arc. The average length of the occipital arc for six 

 male skulls is 113'3 mm., and for two female skulls 110'5 mm. On 

 comparing these measurements with those of the three modern 

 Aberdeenshire skulls in the museum, we note that while the lengths 

 of the frontal and parietal arcs are much the same, the occipital arcs 

 are, on an average, 7 mm. longer in the modern skull ; further, this 

 difference in the length of the occipital arc takes place in that part of 



1 Eoyal Institution Lecture, Nature, 6th and 13th Jan., 1898, 



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