OGG 



MR. G. K. HrLT.rA' OX rOSTKUIOIl 



[Apr. 19, 



',\. ( >ii ;in example of Posterior Dicliot oniv in an Aylesl)nry 



i)ncklill<i,. 1)V G. K. lilLLRN.* 



1 Recciv.'u Miiivii M-, IrtlO.] 



(Text-tignres G:! ct (U.) 



Tt is well known that instance.s of dicliotoniy and the i-e- 

 diiplicatiou of liinl)s oocur not unfrequently in doiiiesticated 

 nianunals and hirds. Mnny examples of such malformations 

 ]ia\'e been I'cecn-ded hitherto by snch anthors as Fiirster, 

 St. Hili»ii-e, Alhfeld, All)ers, l>Mll:intyne, His, and Bland Sutton. 



The last named, in his work entitled ' Evolntion and Disease,' 

 ♦ leseribes amongst other examples of bir<ls having snpernninerary 

 pelvic and other limbs, a chick, wliich presents the most fre(pientl3' 

 observed charactei'S of po.sterior dichotomy. In tiie main, the 

 snbiect of the present paper is somewhat similar, lait witli the 

 addition of certain well-marked deviating characters which do iR)t 

 tippeni' to have been descrilx^l bv any previous anthoi-. 



Text-fi-r. G3. 



Avli'slmry lhi(l<linp:. witli suponuiiii'iarv Icp; (ri'ducod). 

 'I'lie specniieii under disciis.sion (te.\1-llg. (>.">). now in the 

 * C'()Miiiuuik':it<'<l liy .I<Mi\ II.ii'kiN^oN. F.L.S.. F.Z.S. 



