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NEI'llRI N .\R\ )'A r 1 1 OLOGY. 



^rAI,FOR.\IAT■fO^■S RESUI.TTXG FR0\[ excessive DEVELOPJtENT OR 



ovi£RGROWTii. — ^Excessive development is usuall}- evidei.<:e(l as a 

 multiplicity of digits or phalanges though there may be multiplicity 

 oi anv structure. 



Pol\dact\'lis!H. — The name applied to a malformed individual 

 in which there is an excessive number of digits. Individuals 

 having supernumerary digits are frequently observed. The 

 condition is probably more freiaiently observed m hoys than 

 in other animals. Polydactylism, however, occurs occasionally 

 in the ox and horse. 



:. — I'ol: (lact: lisni ir 



Polyiiicliisflioraciciis. — This is a malformation in which the 

 afl'ected animal has one or more extra front legs. An interest- 

 ing case was observed in a cow in which there was an irregular 

 bone attached to the right scapula, and extending across the 

 median line. This bone articulated with an irregular supernum- 

 erary scapula and also with the spine of the left scapula. This 

 irregular formed scapula articulated with another bone which 

 was similar to a humerus on the distal end of which there was 

 a rudimentary ulnar. The condition of supernumerary posterior 

 legs is termed polymeluspvgus. 



Dicaudis. — An individual having two tails. This tvpe of 

 malfi irmation is not very common. It is probably the result of 



