THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
(FIFTH SERIES.] 
No. 77. MAY 1884. 
— ———— 
XXXV.—The Classification of the Animal Kingdom, with 
reference to the newer Zoological Systems. By Dr. T. 
Marco *, 
THE sum of our knowledge of the anatomical and histological 
structure as well as the development of different animals 
has advanced of late years with wonderful rapidity. In 
accordance with this the views of zoologists as to the classi- 
fication of the animal kingdom have also changed continually. 
It is therefore no wonder that with such frequent alterations 
of the system younger naturalists, who may be inclined to 
regard the system as the foundation of the science, find them- 
selves at first in no small difficulty, until, subsequently, after 
they have penetrated more deeply into the interior of nature, 
and recognized the essence of zoology more accurately, they 
arrive at the right view, that in reality classification or taxo- 
nomy is by no means the foundation of the science, but 
rather only the roofing-in of the structure raised upon the 
foundation of morphology and embryology. 
As the main cause of the vacillations nowadays apparently 
occurring in classification we must undoubtedly regard only 
* Translated by W. 8S. Dallas, F.L.S., from the ‘Mathematische und 
naturwissenschaitliche Berichte aus Ungarn,’ Band 1. pp. 234-260 (1883), 
Ann. & Mag. N. Hist. Ser. 5. Vol. xii. 21 
