SECTIONAL TRANSACTIONS.— H. 399 



(Angles, West Saxons, East Saxons and Jutes) and of the total series com- 

 pared with those for other series. The Anglo-Saxon type is compared with 

 other British ones of different periods. The distinction previously observed 

 between the Anglo-Saxon and all later English populations for which 

 adequate cranial data are available is confirmed, and illustrated by average 

 measurements (including values for lower jaws) and type contours. Com- 

 parisons with continental material show that the Anglo-Saxon type bears 

 a closer resemblance to that of the Row-Grave people than to any other 

 known. 



Mr. J. C. Trevor. — Some anthropological characteristics of populations 

 derived from the crossing of distinct ethnic groups (3.30). 



This paper forms part of an investigation into the social and biological 

 effects of race crossing at present being undertaken by the writer, who holds 

 the Eugenics Society's second Leonard Darwin Research Studentship at 

 the Galton Laboratory, University College, London. 



The anthropometric characters of a number of series representative of 

 living groups of mixed descent from various parts of the world are con- 

 sidered. It is found in every case that for characters which clearly distinguish 

 the two presumed parent populations the average measurements of the one 

 derived from them are intermediate in value. As far as can be ascertained 

 from the best evidence available, the cross results in a nearly perfect blending 

 of average values, determined by the proportions in which the parent popu- 

 lations have mixed. This observed situation cannot be reconciled with 

 views expressed by some geneticists. The fact that the cross results in a 

 blending of average measurements makes possible a classification of the 

 races of man based on these criteria. The variabilities of the crossed series 

 are seen, in general, to be no greater than those of the parent populations. 

 The available material is hardly adequate to give any exact indication of the 

 forms of the distributions of metrical characters in the populations sampled, 

 but there is no suggestion that any of these depart appreciably from 

 normality. 



Miss M. L. TiLDESLEY. — Comparison of the face and jaws of a mediaeval 

 (Scarborough) and a post-mediaeval (London) population (4.10). 



Visit to Nottingham Caves. 



Friday, September 3. 



Presidential Address by Prof. J. H. Hutton, CLE., on Assam origins in 

 relation to Oceania (lo.o). 



Mr. H. A. Fosbrooke. — A new Bantu tribe (ii.o). 



The Sonjo are a small tribe of some 2,500 souls, isolated in the middle 

 of Masailand, and situated in country about 15 miles west of Lake Natron 

 in Tanganyika territory. They are new only to scientific literature and 

 discussion, having been under administration since German times. 



The object of the series of slides is to show that there still exists at least 

 one Bantu tribe in a practically untouched state, in that the Masai have 

 presented a barrier to all those influences — slave raiding, trade, missionary 

 activity, both Christian and Islamic, tribal admixture, etc., which have so 

 fundamentally altered the structure of the majority of Bantu tribes. 



