CHAP. xxiv. OF MAN AND APES COMPARED. 489 



the presence of both the hippocampus minor and the poste 

 rior cornu. 



Tiedemann had expressly stated that ' the third or hinder 

 lobe in the ape covered the cerebellum as in Man,'* and as 

 to his negative evidence in respect to the internal structure 

 of that lobe, it can have no weight whatever against the 

 positive proofs obtained to the contrary by a host of able 

 observers. Even before Tiedemann's work was published, 

 Kuhl had dissected, in 1820, the brain of the spider-monkey 

 (Ateles beelzebutli), and had given a figure of a long pos 

 terior cornu to the lateral ventricle, which he had described 

 as such.f 



The general results arrived at by the English anatomists 

 already cited, and by Professor Eolleston in various papers 

 on the same subject, have thus been briefly stated by Pro 

 fessor Huxley : 



6 Every lemur which has yet been examined has its cere 

 bellum partially uncovered, its posterior lobe with the con 

 tained posterior cornu and hippocampus minor more or less 

 rudimentary. Every marmoset, American monkey, Old 

 World monkey, baboon or man-like ape, on the contrary, 

 has its cerebellum entirely covered, a large posterior cornu, 

 and a well-developed hippocampus minor. 



' In many of these creatures, such as the Saimiri (Chryso- 

 thrix), the cerebral lobes overlap and extend much farther 

 behind the cerebellum in proportion than they do in Man.'J 



It is by no means pretended that these conclusions of 

 British observers as to the affinity in cerebral structure of 

 Man and the Primates, are new, but, on the contrary, that 

 they confirm the inductions previously made by the principal 

 continental teachers of the last and present generations, such 



* Tiedemann, Icones cerebri Simi- fart am Main, 1820. 

 arum, &c., p. 48. { Huxley, 



f BeitragezurZoologie,&c., Frank- 



