XVi INDEX TO ZOOLOGY. : 
Zeuglodon, 481. | ductory remarks upon, 1; brief! animal kingdom based on the eys- 
Zeus faber, 227. outline of the history of the science! tem of Cuvier, 9-15; descriptive, 
Ziphius, 428. and of the principal systems of,| 16. ; 
Zoanthide, 36. 1-3; distinguished as general and| Zoophyta, the, why so called, 38; 
Zoarces, 230. special, 3; various principles pro-| what animals are included under, 
Zonotrichia albicollis. melodia, leuco-| posed for the classification of ani-| 9; orders of, 9; Cuvier’s arrange- 
phrys, graminea, &c., 357. mals, 4; important affinities be-| ment of, 25; resemblance hetween 
Zoogeography, or the geographical] tween plants and animals, 4-6] the, and the acalephe. 31; princi- 
distribution of animals, 7; survey| and essential differences be-| pal characters of, 33; Dana’s classi- 
of the geographical distribution of} tween, 6; observations on the geo-| fication of, 34. 
mammialia, 498-502. graphical distribution of animals,| Zosterops, 340. 
Zoology, definition of, and intro-| 7, 8; sketch of the orders of the] Zygeena, 182; zygenide, ib. 
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