296 M. F. Tiedeman on the Brain of the Common Dolphin 



should be held as a guide for at least all Friendly Societies in 

 Scotland. 



As formerly mentioned, a Select Committee of the House of 

 Commons was again appointed during the session of 1827 ; the 

 result of whose labours we shall be enabled to give in a future 

 Number of this Journal. 



{To he continued.) 



The Brairi of' the Common Dolphin compared with that of Man. 

 By M. F. Tiedeman. 



J3JL* Tiedeman proposes to publish, in the Journal of Phy- 

 siology, conducted by Treviranus and himself, a series of mo- 

 nographs on the brain of. various animals, with the view of sub- 

 sequently eliciting conclusions relative to the structure of the 

 brain in general, or to its organisation in the different classes 

 and orders of the animal kingdom. In volume second of the 

 Journal of Physiology there is a very interesting memoir " on 

 the brain of the dolphin, as compared with that of man *."" 



With reference to the points of resemblance, and the diffe- 

 rences that present themselves on comparing the brain of the 

 dolphin with that of man, M. Tiedeman states the following re- 

 sults, 



1. The brain, properly so called, of the dolphin, is distinguish- 

 ed from that of monkeys, by its great size, and next to the 

 brain of the orang-outang approaches nearest, in this respect, to 

 the human brain. 



In relation to the nerves, the spinal marrow and cerebellum, 

 it is much smaller than the brain of man. The individual, of 

 which M. Tiedeman dissected the brain, was six feet long. The 

 author does not mention the weight of the brain, but the figures 

 ,( which, however, appear a little diminished,) and the different 

 parts pointed out in the description, may afford an idea of it. 



% Each of the cerebral hemispheres is composed, as in man 

 ^id the monkey tribe, of three lobes, an anterior, a middle, and 

 * ^eitschr. fur Physiologic, t. ii. p. 251. 



