MALFORMATIONS. 



101 



I'rognathisni, common namt- "undershot. ' 



a division or clea\'age of the caudal segments during embryonic 

 formation. 



Mnltiplicitv of internal organs is occasionally observed. Thus 

 several cases of partiallv double spleens have been reported. An 

 interesting case of malformation was observed in a hog, the defect 



