26 =Mr.W.S. Macreay on the Comparative Anatomy 
some of Aristotle’s subdivisions of it, which are all excellent. 
The group of Uncutara has not, however, escaped the eye of 
M. Cuvier. 
The last order we have to mention is the z7rwd, of Aristotle, 
Cetaceum genus of Ray, Cete of Linneus, and Natantia of Illi- 
ger. It is in truth a group which cannot fail to strike the most 
ordinary observer, from the limbs taking the form of fins, and 
the whole animal the form as well as habits of a fish. 
Every Mammiferous animal may be reduced to these five 
orders; that is, may be assimilated, in a greater or less degree, 
to one or other of the following typical forms; viz. Man, the 
Lion, the Horse, the Whale, and the Mouse. 
I shall show hereafter how these five orders form a continued 
series returning into itself, so as to be a natural group. In 
the mean time, I must recall to the attention of the reader the 
orders of Birds as defined and arranged by Mr. Vigors*; and 
to which definitions and arrangement I have just applied so 
severe a test, only to corroborate their accuracy and to make 
them display additional harmony. 
When we have heard the Parrot or Mainate speaking ; when 
we have witnessed the former feeding itself as it were with a 
hand; when, in short, we have reflected on the remarkable 
intelligence and development of brain throughout the whole 
order of Insessores, to which both birds belong,—there has been 
no one, perhaps, dull enough not to compare them to Primates. 
fEliant says: “Ta we arr trav wdinay OgVEMY EVTTOMEL, HAL TY YAWTTN 
Pbeyyeras, Oingv avdewrov.” I allow, indeed, that it is difficult to 
follow the opinion of the great naturalist of France, who, igno- 
* Linn. Trans. vol. xiv. p. 406, et seq. 
+ Ed. Schneid. lib. I. c. xx. With respect to the particular case of Parrots, 1 
cannot do better than refer to the ample collection of classical quotations given on this 
subject in the Zoological Journal, vol. ii. p. 40, &c. 
rant 
