ON THE ORGAN OF MARRIAGE. 476 



union, the cerebral hemisphere is not only much raised and well rounded towards 

 its posterior edge, but that it is prolonged, even in a perceptible manner, over the 

 tuber xula quadrigcmlna. 



Another fact which I should point out is, that, if we remark the extent of the 

 posterior part of the cerebral hemisphere from the point where it touches the other, 

 to the exterior side, this part is found much more developed in the cases just 

 mentioned than in those species which are not united for life. We may compare in 

 this respect the brain of the domestic Goose with that of the Buzzard ; and again 

 we may compare this region (No. 8) in the Raven with the same region in the 

 Turkey and the Common Fowl. With a little attention it will be found that the 

 difference is very striking. I beg those who possess a collection of skulls of 

 animals to place the skull of a Turkey and that of a Hooded Crow near each 

 other ; they will at once be struck with the difference which I have just now 

 pointed out ; in the Turkey all that portion is depressed ; in the Hooded Crow, 

 on the contrary, it is full and rounded. 



The portion of the brain which manifests attachment for life in quadrupeds is 

 that which is found situated backwards and outwards from No. 11 (Fig. 7, 

 pi. lxxv.*). Let any one compare two brains having very nearly the same 

 volume and of the same class, — the one, for instance, which I have now pointed 

 out, being that of an animal which lives in the state of union ; the Martin 

 Weasel, with that of the Cat, which lives in the opposite state, and he will see 

 that, in the former, the convolution 10 is not prolonged so much backwards, and 

 covers much less of the cerebellum. The convolution 10 in the Cat is that which 

 gives rise to Philoprogenitiveness. In all the animals which live in a state of 

 union this convolution is extended more backwards. I have found these relative 

 positions well expressed in the brain of the Badger, the Fox, and the Fitchet, 

 Marten and Common Weasels, all animals living in a state of union. We may 

 compare with this view the brain of the Badger with that of the Dog. The 

 same part seems to me but little developed in the Rabbit, the Hare, and the 

 Guinea-pig. Again, to show the difference of development of the organ in ques- 

 tion, we may compare the brain of the Weasel, which lives in a state of union, 

 with that of the Guinea-pig, which feels no lasting attachment to its female. 



Before closing the account of the faculty which leads Man and animals to be- 

 come united for life, I cannot pass over in silence certain remarks which might 

 seem to militate against the opinion which I have now offered. We are told, and 

 Gall himself relates the fact, that Wild Cats and Wolves had lived together in a 

 state of union. Even supposing this observation to be true, I do not think that 

 it oan overthrow the opinion that attachment for life is the characteristic of some 



♦ This plate we have npt given.— Ed. Nat. 



