8 SCIENCE PROGRESS. 



Departments of Dordogne and Correze was formerly pre- 

 cisely that between Perigord and Limousin, and in earlier 

 times between the Petrocorii and Lemovices. To the 

 right of this entirely conventional frontier the indices run 

 from 85*4 to 87 '3, while to the left they vary from 787 

 to 8 1 "4, but there is nothing in history to explain this dis- 

 crepancy. The explanation appears to be that well before 

 the Conquest the two peoples differed in race, the one being 

 what Caesar called Celts, the other probably belonging to 

 the people whom he named Aquitainians. 



The southern portion of Dordogne is also brachyce- 

 phalic and Celtic, and so Dr. Collignon is inclined to think 

 that it did not form part of the territory of the Petrocorii, 

 but that it should be divided among the Nitiobriges and 

 Cadurci, whose equally brachycephalic descendants still 

 people Lot-et-Garonne and Lot. Another line of evidence 

 supports this conclusion. It is known that the primitive 

 episcopal dioceses corresponded to the territories of the 

 ancient Roman civitates, since a bishop was established in 

 each city by the emperors. Whilst the northern, eastern 

 and western frontiers of the diocese of Periguex correspond 

 very closely with that of the modern Department, the 

 region south of the Vezere belongs to the Bishop of Cahors, 

 which tends to show that the natives of the south of Dor- 

 dogne are the descendants not of the Petrocorii, but of the 

 Cadurci. 



The differences between the two parts of Limousin, of 

 which the one forms part of Correze and the other the south 

 of Haute- Vienne, can be explained in an analogous manner. 

 The former is brown and brachycephalic, while the latter is 

 fair and dolichocephalic. 



One may well believe that the Lemovices, those of the 

 neighbourhood of Limoges, were no more Petrocorii than 

 Celtae, but a fair people of Belgic or Germanic origin, estab- 

 lished in Celtica, who had over-lorded the ancient brachy- 

 cephalic people who there preceded them. 



Inversely, Briva-Curetia, another old Gaulish town of 

 Limousin, was the centre of gravitation of the first inhabi- 

 tants, if not their capital. 



