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o! their valleys. We consider the drift phenomena of the caverns on the Lease 

 to bear the same relation to the existing physical conditions of the country 

 as OKr old Severn and Avon, low level valley drifts, bear to the existing rivers, 

 their silted up lakes and alluvial plains. We see no reason for attributing 

 a more antique history to the human remains of the "Trou de Naulette," 

 than to the numerous other examples given by Sir Charles Lyell in his " Anti- 

 quity of Man," where human boues, or human implements, have been found in 

 cavern deposits associated with the remains of the extinct animals. 



The principal interest attached to the caves on the Lesse is owing to 

 the great numbers of human relics that have been found there ; and I may 

 here observe that the particular cave in which the very remarkable jaw was 

 found lying close by the bones of the rhinoceros, is considered by Dr. Dupont 

 to have been a den of the hyiuiia, for here were found the coprolites or fossil 

 dung of that animal, and also a considerable number of gnawed bones of 

 elephant and other animals. The rhinoceros bone iu question presents strong 

 marks of the hyrena's canines. 



With respect to that jaw I have no opinion to give. Since I visited 

 the caves with Sir William Guise, the Anthropological Society of London 

 have sent a deputation to Belgium, and I cannot do better than close this 

 paper with an extract from The Reader, giving an account of the jaw by gen- 

 tlemen who I do not doubt are comparative anatomists, and therefore write 

 with authority : — 



" A cast of the jaw found several weeks ago by Dr. Edward Dupont, 

 in the Trou de la Naulette, is now in the Museum of the Anthropological 

 Society of London, Compared with the extremely ' brachycephalic * jaws 

 which have been discovered in the caves of Arcis-sur-Aube, and from various 

 prehistoric deposits in the south of France, this jaw represents the extreme 

 term of a series, the other end of which is exhibited by the lowest members 

 respectively of the Lapp and Australian races. By the quinque-raminato 

 mode of implantation of its third true molar, by the enormous size of tho 

 canines, by the absence of any chin, by the absence of genial tubercles, by 

 the great symphysial beak-shaped degree of prognathism which it exhibits, 

 it affords characters which, though they may be present in different individuals 

 of the lower races of man, have never hitherto been found united in any single 

 specimen. During the last fortnight it is said that a canine and an incisor 

 tooth have beenfound in this cavern. The inoisior presents markedly peculiar 

 characters, and the canine indicates its great projection above the jaw. Tho 

 occunence of these remains with those of EUphas primigenius, Rhinoceros 

 tkhorinus, and Hymia spehca, in stratified sand, subjacent to stalagmite, has 

 been thoroughly demonstrated. The cast has been submitted to some distin- 

 guished members of the Societe d' Anthropologic de Paris. One great authority, 

 whose anatomical qualifications no one can dispute, held out for a fortnight 

 that the jaw must have belonged to an ape, but yielded to the arguments of 



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