188 On the Structure of the Brain in Man and Monkeys. 



years must have elapsed since they were left dry. This Lab 

 dwelling belonged to the Bronze period, and the date thus ob- 

 tained, agrees pretty well with that obtained from the examina- 

 tion of the Cone de la Tiniere. M. Troyon adds that "rien iie 

 fait soup9onner, pendant I'epoque humaine et anterieureraent a 

 notre ere, des conditions d'accroisement differentes de celles qui 

 ont eu lieu posterieurement aux Romains ; le resultat obtenu est 

 meme un minimum, vu que la vallee va se retrecissant du cote du 

 lac et que nous avons admis la presence de celui-ci au pied meme 

 d'Eburodunum dans le IVe si^cle de I'^re chretienne, tandisqu'il 

 est probable que la retraite des eaux n'a pas ete insensible depuis 

 le moment ou les Romains se sont fixes sur ce point." 



However this may be, and while freely admitting in how many 

 respects this calculation is open to objection, we may still observe 

 that the result agrees in some measure with that given hv the 

 Cone de la Tiniere. The ancient histofy.of Greece and Eorae, 

 as far as it goes, tends to confirm these dates, since we know that 

 ! of Homer and Hesiod, arras were in part at least, 



I very early period, t 

 "elv( ■ ■ ^ 



made of i 



was a certain amount of commerce between Helvetia and the 

 shores of the Mediterranean, we can hardly suppose that a metal 

 so immensely important as iron, can have remained unknown in 

 the former country, long after it was generally used throushout 

 the latter. -^ 



Stil], though we must not conceal from ourselves the imper- 

 tection ot archaeological record, we need not despair of event- 

 ually obtaining some more definite chronology. Our knowledge 

 of primitive antiquity has made an enormous stride in the last 

 ten years, and the future is full of hope. I am glad to hear from 

 M Troyon that the Swiss archaeologists are continuing their 

 labors. They may feel assured that we in England await with 

 interest the results of their investigations. 



Aet. XYll.-~Upon the structure of the Brain in Man and Mon- 

 keys, and its bearing upon classification, luiih special reference to 

 the views of Owen, Huxley and Gratiolet ; by R. Wagneb.* 



OWEX has proposed a subdivision of the mammals [see tbis^ 

 Journal for 1848, pp. 7 and 177] founded upon the structure ot 

 the bram and more particularly upon that of the cerebrum and 

 the presence or absence of gyrations upon it. The two lower ot 

 the four sub-classes he makes, the Ljencephala and Lissence- 

 phala, including the Monotremata, Marsupialia, Rodentia, Insect- 

 ^yora, Cheiroptera and Edentata, have the hemispheres of the 



