124 THK GROWTH OF THE BRAIN. 



examine the entire range of brain-weight for the adult. 

 This is given in Table 24, where the brains are arranged 

 in five classes, according to size, namely, macrocephalic, 

 large, medium, small, and microcephalic. 



T.\I;I.I: 24. THE NOMENCLATURE OF THE ENCEPHALON 



ACCORDING TO WEIGHT. WEIGHT IN GRAMMES. (70- 

 pinard.} 



Excluded from these tables, of course, are the cases 

 of monsters born with comparatively little functional 

 brain substance, but which have continued to live for 

 months. Directly continuous with these excluded cases 

 is the group of defective individuals with heads ranging 

 from extremely small to small, and designated as 

 microcephalies. The weight below which the brain 

 is designated as microcephalic is 1,000 grammes in 

 males, 900 grammes in females. The best list of these 

 microcephalic cases has been compiled by Marchand, 

 and contains some fifty entries, including male brains J 

 weighing up to 1,015 grammes, and female brains up to 

 924 grammes, but it is unnecessary to repeat it here in 

 extenso. Examination of the table shows that among 

 children the smallest brain-weight is reported by Calori, 

 the case being that of a female child 9 months of age, 

 53 cm. high, and possessed of a brain weighing 69*3 



1 Marchand, Acta. d. Kaiserl. Carol. Deulsch. Akad. der Natur- 

 forscher, Halle, 1890. 



