136 



HIGH SCHOOL ZOOLOGY. 



Tipon all, concealing such strnctui-al characters as might be re- 

 lied upon for making a natural classification, and causing tlu^ 

 ornithologist to depend frequently on characters which are in 

 relation to the food or the manner of life (Figs. 96, 97). The 



^Iaa-Vn 



Fi;r. 07. — Outlines of bills of various {jenera. 



L Lcjitiiptiliia, niaralxi ; P. Pasxer, sparrow ; Ca. Caticroma, Boatbill ; D. Doci- 

 HinsVcv, Swordhill ; PI. Pla(al<>rt, spoonbill ; Pe. Pidecanus, pelican ; T. Tvnlua, nnish ; 

 Me. Rec}irmro!itra,!x\()cet Ph. Plianii'upteriin, Flaniini>o ; Ky. Jilii/nchops, .Skimmer, 

 A Anastonms, stork; B. DalKniccpa. shocbill ; S. Snrcothamjilnix, coiulor ; Co. Cul- 

 uinba, pijjeon ; My. Mycteria, stork ; Me. Meiyns, Merganser; 1 Ibis. 



difficulties of classification are chiefly met with among the 

 higher orders, to which not only by far the greatest number of 



