28 GEOLOGICAL MEMOIES. 



The author then gives a detailed description of the human jaw 

 and cubitus, and compares the former with the one discovered asso- 

 ciated with remains of ElejpJias j^rimigenius and Bhinoceros ticho- 

 rJiinus in the grotto of Arcy by M. de Yibraye, and with a jaw of the 

 age of the Eeindeer which came from the " trou de Frontal," with both 

 of which, notwithstanding that the latter is of a much more recent 

 geological age, he declares it to have a most intimate connexion. 



Several bones, associated with these human remains, seemed to 

 bear traces of the hand of man, especially a fragment of a bone which 

 may be referred to a ruminant. The hole which is pierced is evi- 

 dently artificial, the sides of the incision being very sharply cut. 

 The sides of the fragment appear cut with a sharp instrument, 

 unless, as M. de Quatrefages suggests, it be a particular mode of 

 fracture. [A. S.] 



On THEEE Caverns in the Yallet of the Lesse explored during the 

 months of Maech and April 1866. By M. E. Dtjpont. 



[Etude siir trois cavernes de la Lesse explorees pendant les mois de Mars et 

 d'Avril, 1866, par M.^Edouard Dupont. Bull, de I'Acad. Eoyale de Belgique, 

 2me ser. tome xxii.] 



Trou de Praule. — The cavern of Praule is situated on the left bank 

 of the Lesse, about 600 yards up the river from Furfooz. It is easy 

 of access, and about 98 feet above the level of the river. The cave 

 is 19^ feet broad, and has a length of 11 feet in the centre, its mean 

 height between the rocky floor and the roof being little more than 

 6| feet. 



Upon the calcareous soil is a thin bed of sandy stratified clay, 

 with rolled pebbles and gravel in non- continuous veins — the cha- 

 racteristic of the Lehm, or middle stage, of the Quaternary formation 

 of I^amur. The deposit yielded a humerus and a canine of a Great 

 Bear, which, the author ^ considers, confirm the application to this 

 Lehm of his name of '' Etage a Ursus speloius.'' These beds are over- 

 lain by yellow clays with blocks (argiles jaunes a blocaux), which 

 contain, especially at the base, worked flints and bones of the Bear, 

 "Wolf, Fox, Horse, Eemdeer, and Goat. The flints worked in the 

 form of a knife are few, and are derived from the Chalk. The bones 

 are probably the remains of repasts of men, as is generally the case 

 in deposits of this nature in the caverns of the banks of the Lesse. 

 These facts prove, in the author's opinion, that the argile a hlocaux 

 should be referred to the age of the Eeindeer, and is relatively 

 anterior to the deposition of the vast covering of clay. To the beds 

 thus characterized, which form the upper stage of the Quaternary 

 formation of the province, M. Dupont gives the name of ^' Etage a 

 Cervus tarandusT 



Trou des Allemands. — The shelter furnished by a sloping dolo- 

 mitic rock, under which the Bohemians established themselves 

 during their wanderings, constitutes this cavern. Shelters of this 

 kind are very numei'ous along the banks of the Lesse, and are 

 generally slightly raised above the river-level. The following is the 



