Chap. i. 
HOMOLOGICAL STRUCTURE. 
11 
| u d'e brain of man has its analogy in that of the orang ; 
ut he adds that at no period of development do their 
JI ' ains perfectly agree ; nor could this be expected, for 
otherwise their mental powers would have been the same. 
' ulpian 2 remarks : “ Les differences reelles qui existent 
entre l’encephale de Fhomme et celui des singes supe- 
rie urs, sont bien minimes. II ne faut pas se faire 
^’illusions a cet egard. L’homme est bien plus pres 
‘ des singes anthropomorplies par les caracteres anato- 
‘ miques de son cerveau que ceux-ci ne le sont non- 
soulement des autres mammiferes, inais memes de 
certains quadrumanes, des guenons ct des macaques.” 
11 1 it would be superfluous here to give further details 
the correspondence between man and the higher 
'“animals in the structure of the brain and all other 
parts of the body. 
It may, however, be worth while to specify a few 
points, not directly or obviously connected with struc- 
tlxie > by which this correspondence or relationship is 
"oil shewn. 
Man is liable to receive from the lower animals, and 
lo communicate to them, certain diseases as hydro- 
P mbia, variola, the glanders, &c. ; and this fact proves 
ae dose similarity of their tissues and blood, both in 
'“mute structure and composition, far more plainly than 
f oes their comparison under the best microscope, or by 
16 a 'd of the best chemical analysis. Monkeys are 
'able to many of the same non-contagious diseases as we 
j* le ’ thus Rengger, 3 who carefully observed for a long 
^ 11116 t,le Celus Azarse, in its native land, found it liable 
0 cata 'T'h, with the usual symptoms, and which when 
, sur ' a Phys.’ 1866, p. 890, as quoted by M. Dally, ‘L’Ordre 
a f£ matea et h Transformisme,' 1868, p. 29. 
- aturgesehiclite der Saugethiere von Paraguay,’ 1830, s. 50. 
