[Vol. LIII 



years, in spite of tlio many environmental changes to 

 which the bird has been subject. As regards the struc- 

 tural details of the feather the germ plasm of the ostrich 

 fully confirms the statement with which the se<2tion opens. 



II 



''Miriim nf r/rni> phis),,, }„ „>ul of Iff^elf, floes not mu- 

 ir tl!<' pliiin;iuc cli.-ii-Mrtci-- nf the (.^trich are so innnu- 



till.ir Ulmt tiuMl i-^ llM-(.l.j.M-tixV ill hr.MMlillg? Tl KM) I" i TUll 

 >i\-lir^ .lithM-.Ml inurl, ;,IIM.im- t ! KM 1 1 m ■ I V(- iu tlu" ^tlllrlurnl 



sti-;iin^. 'J lir i iifin sl n/flcaror of the, ostrich breeder is 

 to ,nn,irnn I, tin ^iuoh phnue the best of all the many 

 fir.inihh h„t.:r. ,n-ninnilh, sratten'd throHfih out the 

 irihl i„nl.^. Tlir ultiiiwih' fiirpoM" of vxwk 1)iv<'(1,m- the 

 sai,i<— r.) lU'n.lii.M- a plunu. .m.hiIh ni il,,. „ia\iiii;i of all 

 the availahl.' t'catlicr clmnicl .')■- a pliutic liMviii- the 

 greatest length, width, den>ity .•ni.l 1um<t an.l ilir nost 

 perfect shape, supported on a niiiiid. -iroiiu'. -lender 

 shaft. On the original birds tlic liiruc-l iiliiiiic- hnd for 

 the most i)ai-t a coarse, hiosc. iiii-hapcK flue, while the 

 mo-i eonipaet. -h.-ipely. hi-trcu-. urweeful plui.H- were 



geiaT.MlK Hliall. The whiJe etlnrl i- t<. <'<.liihilie the liiaxi 

 mum >ize with ail th,' >n-eahed -.lualitv point-": iie .^ther 

 featui-e of tlie hi,.] i- talceii intn ae.-eunt in Invedin- ns 



way correhlted with I'eath.T pr(H hlet iell. The prnhl<M'u 



appenr> -imph', th..m:h it i- taklt-u >eai- tn aeen,,iph-h; 

 progress is being ma(h' eacli Near, hut the ideall_\- perfect 

 ostrich plume is not yet. 



The genetical method- .,[" the I'annei- are likewise 

 sim])le. ITe y)rocee(ls eiitii-el\ in the heiief el' a hh'iiding 



