TRANSACTIONS OF SECTION H. 897 



He has made patient and long-continued search in modern and ancient gravel 

 teds, in the beds of existing rivers, in ' Kame ' deposits, and finally in certain 

 phases of _ boulder clay ; and he finds that each piece of research yielded some 

 corroborative evidence, but that the boulder clay — i.e., certain characteristic por- 

 tions — yield abundant evidence, in the shape of glaciated, broken, and crushed 

 specimens of the vreapons of Palaeolithic man. He believes them to be as common 

 in certain ancient soils, and in these certain phases of the boulder clay in Scotland, 

 as they are in any areas or deposits in England or France. 



The material in which the weapons mainly occur represents ancient river-accu- 

 mulated beds, exact equivalents of those of the Ouse and Thames and Somme 

 Valleys, which are characterised by their weapons, and remains of extinct mamma- 

 lia ; and they were formed in exactly identical circumstances during a long period 

 of time, terminated in the north by an inception of glaciers, which did not affect 

 such valleys as now contain undisturbed implement- and bone-bearing strata. 

 Kemains of the mammoth and other extinct forms have been found in the north, but 

 the ponderous steps of glaciers down the valleys of mountainous England and 

 Scotland cannot have left many recognisable osseous remains. 



The actual tangible results of the author's years of research are the best proof 

 of his success^ in what he undertook to prove. He has collected at least 350 

 specimens, which he believes to be definite evidence of the long-continued sojourn 

 of Palaeolithic man north of the Border; the large majority of these specimens he 

 proposed to exhibit at the Association's meetings in Edinburgh; many of the 

 specimens in this collection he considers as characteristic and unassailable as any 

 from Southern England or France. 



5. Notes on Cyclopean Architecture in the South Pacific Islands. 

 By E. A. Steendale. 



6. On a Fronto-limhic Formation of the Human Cerebrum. 

 By Dr. L. Manouvrier, Professor at the School of Anthropology, Paris. 



I. Exposition des Faits. 



1°. Quand la premiere circonvolution frontale est doubl(5e longitudinalement, 

 la circpnvolution du corps calleux reste presque toujours simple, mais d'autant 

 plus mince ou etroite que la frontale interne est plus d^velopp^e en largeur. 



II e.xiste un veritable balancement entre les deux circonvolutions sous le rapport 

 de la largeur. 



2°. Quand la frontale interne n'est pas double longitudinalement et lorsqu'elle 

 est en outre pen large, alors apparait tres souvent sur les cerveaux humains bien 

 d6velopp6s un sillon longitudinal dans I'epaisseur de la circonvolution du corps 

 calleux. Ce sillon, que Ton ne trouve pas chez les anthropoides, mais qui existe 

 chez divers herbivores a titre de complication limbique, r6apparait chez I'homme 

 comme formation frontale supplementaire. 



II peut arriver que ce sillon acquiert un developpement tel qu'il a ^ti5 parfois 

 confondu avec la erande scissure sous-frontale de Broca, et que celle-ci a pu etre 

 ddcrite sur certains cerveaux comme 6tant un simple sillon de dedoublement de la 

 circonvolution frontale interne. 



C'est en dtudiant le cerveau d'un homme tres distingu(5 (Eugene Vdron) que 

 M. Manouvrier a pu saisir, en voie de riSalisation, cette substitution d'un sillon 

 n(5o-sous-frontal a la scissure sous-frontale classique. II en a observe les divers 

 degres de developpement sur une s6rie de cerveaux, et a pu ainsi moutrer, sur le 

 cerveau du Professeur Adolphe Bertillon la realisation complete de la disposition 

 morphologique qu'il d6crit. 



1892. , 3 M 



