OF THE ORANG UTANG. 5 



Having' indicated our opinion that the dealing with such views 

 as those just quoted from Tiedemann's thirty-second corollary is to 

 be safely, though by no means of necessity, delegated to the meta- 

 physician, we may proceed forthwith to lay before the reader the 

 anatomical details which will enable him to decide for himself, 

 whether the Heidelberg anatomist or the French natural historian 

 was the nearer the truth in the matter of fact. 



Multitudinous as are the differences which a detailed comparison 

 of any two brains will disclose, they yet admit of being arranged 

 under four heads. Under the first of these heads we may class 

 those differences which the observant anatomical eye would detect 

 without the assistance of any anatomical instrument, and could ex- 

 press without being necessitated to employ any technical anatomical 

 knowledge. 



Our second class of differences comprehend such as the scales and 

 the callipers reveal. 



For the powers of describing, and one might almost say, for the 

 powers of discovering the third class of differences, we are indebted 

 to M. Gratiolet's masterly analysis of the cerebral convolutions. 

 Previously to the appearance of the ' Memoire sur les Plis Cer6braux 

 de l'Homme et des Primates,' it was all but impossible to express in 

 words the differences which the eye detected in the arrangement in 

 two different brains of what has been called 'the chaos of the convolu- 

 tions.' What was previously all but an impossibility, M. Gratiolet's 

 philosophy has made an easy task. No apology can be necessary 

 for adopting' his phraseology, as the right of naming the country 

 he has conquered is a prerogative never denied to one who has 

 succeeding in subduing a territory which few before him had ever 

 thought of invading. 



Under our fourth head we shall arrange those points of difference 

 which a dissection of the brain alone can reveal. 



These four heads correspond, it is obvious, to the successive stages 

 of an anatomical investigation ; and they possess, consequently, the 

 merit not merely of colligating conveniently the results, but also of 

 corresponding accurately to the several processes of an accurate 

 anatomical investigation. 



The orang dissected was a young male (Simia Morio). The first 

 two molars had just come into use in both jaws ; the weight of the 

 entire body was 16 lbs. 1 1 oz. ; the height was 2 ft. 7 in. None of the 



