478 ON THE RELATIONS OF MAN WITH THE LOWER ANIMALS 
medius; ¢,lobus posterior, “ cerebellum obtegens.” Fig. 2, represents 
the brain of “Szmza rhesus;” and the explanation of the figures 
says: “a, lobus anterior; 6, lobus medius; c¢, lobus posterior.” 
Fig. 3, a figure of the brain of Szmza sabwa, and fig. 4, of “Simia 
capucina,’ have the same lettering, and the letters have the same 
signification. 
And, to permit of no mistake, Tiedemann, at page 48 of the same 
work, tells us expressly :— 
“Cerebrum simiarum quoad magnitudinem et divisionem in lobos 
ad humanum proxime accedit: dividitur enim per fissuram mediam 
longitudinalem in duo equalia hemisphceria guorum utrumque rursus 
zu tres lobos partitur. Lobi posteriores uti in homine faciem supertorem 
cerebelli obtegunt. In ceteris a nobis dissectis quodrupedibus 
encephali hemispheria sunt magis plana et brevia. Lobi posteriores 
quamvis breviores quam in Simiis tantommodo in Phoca occurrunt, in 
reliquis Feris in Leone, Fele, Nasua, Lotore, e¢ zpso Lemure ac 
Bradypode cerebellum fere nudum vel ab hemisphzriis haud obtectum 
conspicitur.” 
In 1825, Tiedemann, describing the brain of the orang (Hirn des 
Orangs mit dem des Menschen verglichen), particularly states that 
each hemisphere is, as in man, divided into three lobes—an anterior, a 
middle, and a posterior; and that the ovate cerebral hemispheres cover 
the cerebellum almost entirely, though they do not, as in man, project 
beyond its posterior margin. 
In the third volume of the second edition of the “ Legons,” Cuvier 
expressly affirms, in speaking of the apes :— 
“Their hemispheres are also prolonged backwards, as in man, to 
form the posterior lobes, which repose on the cerebellum, 
“The cerebellum is almost wholly covered by the hemispheres in 
the seal and otter. 
“In the dolphin, a large proportion of the cerebellum is covered.” — 
pp. 84-86. 
And, in the “ Regne Animal,” he gives as part of the definition of the 
order Quadrumana : “ Le cerveau a trois lobes de chaque cété, dont le 
postérieur recouvre le cervelet.” 
In his elaborate essay “On the brain of the negro, compared 
with that of the European and the orang outang,” published in 
the Philosophical Transactions for 1836, Tiedemann’s zeal for the 
cause of the oppressed black has occasionally led him into some- 
thing very like special pleading; and yet he does not dream of 
hinting the absence of the posterior, or third lobe, present in the 
