/■/A'/O? 



405 



iiiMsl iiirimis lact is the prilcit L;i'ud.ilii in )ii llu; si/i' i,| llic 

 ln-cik's ill llic (lilVcrcnt spccit.-s nl' ( jci ispizn, liTun imc ns lar;^c as 

 tliat Ilia hawfinrh to that of a ilialTincli, and 'if Mr ("inuld is 

 ri-lit in iiicliielin;^ liis sul.)-'.;roii| 1, C ra'tliKlca, in llic main ;j.i'i)UliJ 

 c\x'n ti) tliat iif a \varl;)li'r. 'I'lir larL;cst hcal< in tlic ;^inu-: 

 ("Icnspi/a is slmwn in l"'i;_;-. 1, and the smallest in I'd;^, 3 ; hut 

 instead iif thcif liisn;^- only une inlcrmC(lialL- spdics, with a 

 beak' iif the si/.c slK.wn in ]''i;_;\ P., tlici-c arc no Icis tlian six 

 species willi insensilil)' i^raduatcd beaks. The jjcalc of tlie 

 sub-L;"ioup Certhidea is sliown in I'"ig". 4. 'I'lic ljeal< of 



I. Ocri^pi/.i mni^nini'^lri^. 

 3 Cicovpi/a prirviil.-i. 



?. C.t'js]ii/,"i fnrli-.. 

 4. Ccrthiilei i>li\:icea. 



■;c[ir^ KKOM fiAL.\i\r,M^ ARCiiirrLAi.o. 



Cactornis is somcwliat like that of a starh'n;.^" ; and that of the 

 fourth sub-t;roup, Camarhynchus, is sli;_;htl\' pairot-shapcil. 

 Seeing" this ;^radation and di\x-rsity nf structure in one small, 

 intimatel)' I'clatcd ,^"roup of birds, one mii^iit reall)' fanc\" that 

 from ,an oric^nnal paueit)- of birtls in this archii)cla;_;X), erne 

 species !iad been taken and modified lor dillen^'nt eiuls. In a 

 like manner it mi;_;iit be fmcicd that a bird (iriL;inally a 

 bu/.zard had been induced here to underlain- lln- office ol the 

 carrion-feeclin;^ I'olyboia of ihe Anu'rican contineiil. 



( )f waders and \vat(;rd)irds 1 was aljle to !_;-i.-t onl\- clc\'eii 

 kinds, and of these onl)' three M'ncludiri;_;' a rail eonfmed to the 

 (-lamp summits of the islands 1 ,are new species ( '(HisiderinLj 



