INDEX TO ZOOLOGY. 



Zeuglodon, 481. 



Zeus faber, 'J27. 



Ziphius, 428. 



ZoaiUhida?, 36. 



Zoarces, 230. 



Zonotiichia albicoUis. melodia, leuco 



phrys, graminea, &c., 357. 

 Zoogeography, or ihe geographical 



distribution of animals, 7; survey 



of the geographical distribution of 



mammalia, 498-502. 

 Zoology, definition of, and intro- 



ductory remarks upon, 1 ; brief 

 outline of the history of the science 

 and of the principal systems of, 

 1-3; distinguished as general and 

 special, 3; various principles pro- 

 posed for the classification of ani- 

 mals, 4; important affinities be- 

 tween plants and animals, 4-6 

 — and essential differences be- 

 tween, 6; observations on the geo- 

 graphical distribution of animals, 

 7, 8; sketch of the orders of the 



animal kingdom based on the eys- 

 tem of Cuvier, 9-15; descrintive, 

 16. 



Zoophyta, the, why so called, 8; 

 what animals are included under, 

 9 ; ordeis of, 9 ; Cuvier's arrange- 

 ment of, 25 ; resemblance between 

 the, and the acalephs, 31 ; princi- 

 pal characters of, 33 ; Dana's classi- 

 fication of, 34. 



Zosterops, 340. 



Zyg«na, 182 ; zygaenidae, ib. 



854 



