Srn.lK(TIVK I.KSSOXS/^ 



luicfors iff J'Jroltititnt (Cliiiplor II, pa^cs 14 IGj. — Give 

 examples illtisli-atiii;,'- tin' divei-sity sliowii in the structure 

 ami lial)its of Ijirds. ^^'llat lln-ory lias been advanced to 

 account foi" the wide variation in structure shown hy birds '. 

 What is meant by Natural Selection i How does the 

 theory of I.amairk ditlei- from that of Darwin ? IIow 

 may the tail-feathers of tlie Woodi)ecker liave accfuired 

 their present pointed shape i Is it probable that the Wood- 

 pecker's barbed tonj^ue lias been acquired in the same 

 manner ? 



F<)i;M AM» HaI'.IT. 



The Wing (Chapter II, pag-es 17-24).— Name the func- 

 tions of the winj,'-. What is doubtless its most ])i-imilive 

 use as an oriian of locomotion ? How is it used by young- 

 Gallinules :■ By the young- Hoatzin ^ How is it us<'d by 

 Grebes and Penguins :" By the Osti-ich :■ What variation 

 in expanse of wing-s is presented by birds i What rela- 

 tion exists between shape of ^ving and style of llight ? 

 Give illustrations. Mention some tlig-htl«*ss birds. Why 

 is flight necessai-y to the Razor-billed Auk i I'ndei' what 

 conditions might it exist without the power of llight ? 

 What g-|-ou)) of llightless birds is found in the Antai-ctic 

 region .' Whei-e do they lU'st .'' Why ^ What birds l)e- 

 come tem])orariIy flightless:' In what mann<'i' .'' What 

 lake is inhabited by a flig-hlless ( i i-ebe : Where are llight- 

 le.s.s Gallinules found .■' H«>w did tliey probably I'cach the 

 i.slaiuls tliey now inhabit f Mention other flightless bird.s. 



* Tlic value of these lessons will bo greatly crdiaiu-ed if the 

 teacher will constantly have the pM|)il name additional sjiecies in 

 illustration of the facts and theorirs here mentioned. 



