THE CEREBELLUM, AND ITS FUNCTIONS. 681 



cal," it is as much less in the " pyramidal ;" and thus while the first would be 

 considered, according to phrenological rules, to hold a much larger Cere- 

 bellum, this organ in the latter would be regarded as necessarily very small. 

 Now there i.s not only as much evidence of a strong development of the 

 sexual propensity, in the characters and habits of the pyramidal-skulled 

 Asiatics, as there is in regard to the elliptical-skulled Europeans, or the. 

 prognathous Negroes ; but there is also anatomical evidence to show that 

 the size of the Cerebellum in, the different races bears no relation whatever to the 

 degree of projection of the occiput; for the plane of this organ being some- 

 what oblique in the elliptical skull, is horizontal Jn the prognathous, and 

 nearly vertical in the pyramidal, while the size and anatomical relations of 

 the organ are not in the least degree affected by this difference in its posi- 

 tion. 1 Hence it may be safely affirmed, that no evidence with regard to the 

 relation asserted to exist between the size of the Cerebellum and the intensity 

 of the sexual propensity, has any value, save that which is drawn from the 

 positive determination of the former by measure or weight. 



553. Among the arguments adduced by Gall and his followers in proof of 

 the connection between the Cerebellum and the sexual instinct, is one which 

 would deserve great attention, if the facts stated could be relied on. It has 

 been asserted, over and over again, that the Cerebellum, in animals which 

 have been castrated when young, is much smaller than in those which have 

 retained their virility, being, in fact, atrophied from want of power to act. 

 Now it is unfortunate that vague assertion, founded on estimates formed by 

 the eye from the cranium alone, is all on which this position rests ; and it will 

 be presently shown how very liable to error such an estimate must be. The 

 following is a result of a series of observations on this subject, suggested by 

 M. Leuret, 2 and carried into effect by M. Lassaigue : The weight of the 

 Cerebellum, both absolutely and as compared with that of the Cerebrum, 

 was adopted as the standard of comparison. This was ascertained in ten 

 Stallions, of the ages of from nine to seventeen years; in twelve Mares, aged 

 from seven to sixteen years ; and in twenty-one Geldings, aged from seven to 

 seventeen years. The average weight of the Cerebrum in the Stallion* was 

 433 grammes ; the greatest being 485 gr., and the least (which was in a 

 horse ten years old) being 350 gr. The average weight of the Cerebellum 

 was 61 gr. ; the greatest being 65 gr., and the least 56 gr. The average 

 proportion borne by the weight of the Cerebellum to that of the Cerebrum, 

 was, therefore, 1 to 7.07; the highest (resulting from the very small Cere- 

 brum) being 1 to 6.25 ; and the lowest (resulting from an unusually large 

 Cerebrum) being 1 to 7.46. Throughout it might be observed, that the 

 variation in the size of the Cerebellum was much less than in that of the 

 Cerebrum. In the twelve Mares, the average weight of the Cerebrum was 

 402 gr. ; the highest being 432 gr., and the lowest 363 gr. That of the 

 Cerebellum was 61 gr. ; the highest being 66 gr. (which was in the individual 

 with the smallest Cerebrum), and the lowest 58 gr. The average proportion 

 of the weight of the Cerebellum to that of the Cerebrum was 1 to 6.59 ; the 

 highest being 1 to 5.09, and the lowest 1 to 7. The proportion was, there- 

 fore, considerably higher in the perfect female than in the perfect male. 

 In the twenty-one Geldings the average weight of the Cerebrum was 419 gr.; 

 the highest being 566 gr., and the lowest 346 gr. The average of the Cere- 

 bellum was 70 gr. ; the highest being 76 gr., and the lowest 64 gr. The 



1 The Author's statements on this point are based on the very decided assertions of 

 his late friend, Prof. Retzius, of Stockholm, who paid special attention to this in- 

 quiry. 



2 Anat. Comp. du Systeme Nerveux, torn, i, p. 427. 



44 



