!>S ru r VITAL KTNC rio\s. 



llu- solid portions arc retained in the mouth. The duck af 

 fords :MI instance of this structure; which is, houever, still 

 more- .sli-tMi-j.lv marked in the :;euus flfci'tflix, or Mergansor, 

 where the whole length of llir margin of the hill is hesel 

 \vilh small slurp pointed teeth, directed hackwards: lhe\ are 

 particularly conspicuous in the Mt'ri?n\ .vvn//f,". or n-.l 

 MergtnSOr. The ohjr.-t of thr harhs and iVin^fil 

 \vhu-h :in- :i>pMul'il to llu- tonpir in man.y hirds, 

 Mich as dial >i' llu> Toncan ar.d tin* r<<rrakccl, appt>ars in 

 like manner, to he the detention of snhslanres introduced 

 into the Munith. 



The h(-ak of ihe //,T/;/r///i/>//.v, or 1 )_N ster ca!cli-r, has a 

 \vtMl^e sh;ipi\ nnd acts like an oyster knife for opeiiini; hi 

 \ al\ e slu-lls. 



In the Loxia CUrrir 11, the ujipiM- .uul 



lower inandihh>s cross each other \\ hen the month is closed, 

 a Structure Which enahles this hird to tear open the eotu-s of 

 Ihe pine and fir, and pick out the seeds, hy insinuating the 

 hill hotween the scales. It can split cherry stones with the 

 utmost easr, and in a verv short time, hv means of this pe 

 cnliarly shapetl hill.* 



liinls which dive for the purpose of catching fish have 

 otlen a hill of considerahle length, which enahies them to 

 siM-nre their prey, and changes its position till it is adapted 

 for swallow. 



The ff^yncAo/W, or hlack Skimmer. h;is a \ ei -y sin^ular- 

 1\ toinied leak; i! Li \ ei \ slemh-r. hut tlu^ lower mandihh* 

 ver\ much exceeds in length the upper 'hat while 



skimming the \\a\es m its tlii;ht, it cuts I he u aler like a 

 plough share, catchiui; tin- prev which is on the sun 

 the sea. 



Th'' ls furnished with a singular apparatus 



lor enahlini; it to dart out with great velocity Us loQ| 

 pointed tongue, and transfix tlu^ insects on which it princi 

 |>ally tiM-tls; and theSQ motions are performed so quickly 



r-.m of tlu- l.ill of llu<lirv?. ^ M \.u-n-1!. 

 in tin- lounul. 'M 



