476 SECTIONAL TRANSACTIONS— H. 



The site consists of a town and an extra-mural cemetery. The town was 

 first occupied in the chalcolithic age (period A) by the makers of an excellent 

 monochrome ware whose ajfhnities are somewhat obscure ; but their 

 successors, in period B (covering part of the second millennium), definitely 

 belong to the western group. Their wares are marked by a wealth of plastic 

 decoration ; their houses, mainly of mud-brick, are often preserved to a 

 considerable height. A transitional period follows, when the potters' 

 wheel was introduced and red-cross bowls recalling those of Troy V were 

 made. In the second millennium (period C), Kusura came under Hittite 

 influence, and there is reason to believe that the citadel, like those of Alishar 

 and Bogazkoy, was fortified. The cemetery, which seems to belong to 

 period A, contained pithos-burials and cist-graves. 



M. l'Abbe Breuil. — The thirty metres terrace of the Somme. {Taken as 

 read.) 



Altitude : 30 metres above the sunk bed (to the top, including the loess 

 and its loams). At Abbeville it is only a few metres above the marshes ; 

 at Menchecourt the Riss-Wiirm beach is above it. 



In the coarse basal gravel, the result of solifluxion, it contains crushed 

 industries coming from the beds of the 40-metre terrace (above the sunk 

 valley) : Abbevillian, Clacton I, Acheul I ; it has lost the Cromerian fauna 

 of this high terrace (Elephas meridionalts, Rhinocerus etruscus, Machdirodus). 



In favoured sites, such as Bourdon, it is perfectly preserved as far as the 

 edge of the marshes, and has no lower terrace superposed. Elsewhere, 

 the latter has swept it away, leaving only a hanging cornice, though it very 

 often covers lower lying scraps of it. The rocky base, visible at Bourdon, 

 drops at a rather acute angle. 



Section from the base upwards : — 



(i) Solifluxion at the base : Abbevillian, Clacton I, Acheul I, all crushed. 



(2) Sand and fine fluviatile gravel ; Acheul II intact at its base. Warm 

 Fauna. 



(3) Middle solifluxion, a great part swept away. 



(4) Sand and fine fluviatile gravel ; Acheul II intact at the base and the 

 top ; some few small Levallois flakes. 



(5) Marked solifluxion, intact. Evolved Clactonian on the surface. 



(6) Sand with warm water shells, weathered into reddish sand above. 

 Acheul IV (? the oldest loess). 



(7) Solifluxion of the base of the old loess. Acheul V superposed. 



(8) Old loess. On top, signs of peat. 



(9) A slight solifluxion destroying this. 



(10) Red loam. (Acheul VI and VII.) 



(11) Wiirm I solifluxion, Levallois V on top. 



(12) Lower recent loess. 



(13) Middle solifluxion, Levallois VI on top. 



(14) Middle recent loess. 



(15) Upper solifluxion, Levallois VII on top. 



(16) Upper recent loess. 



(17) Brick earth with gravel coming from a destroyed solifluxion. Upper 

 Palaeolithic. 



Afternoon. 

 Prof. C. Daryll Forde. — The stability of unilineal kin groups (2.15). 



The fundamental importance of unilineal kin groups in primitive social 

 organisation has long been recognised. Unilineal reckoning permits the 



