12. The specidum (See Key 1) is the exposed the Specu- 

 portion of the secondaryf quills with their longer coverts, lum, 

 distinguished by conspicuous and often metallic colour- 

 ation. It it not visible from below but is so remarkable 

 a feature of the Duck family and so useful as a means 

 for superficial distinction between the species that it 

 has been included in this Key. 



Note. — The spelling in Cols. 2 and 3 is that of " the Game Birds of 

 Britisli India, etc." unaltei'ed. 

 • From the Fauna. 



t NoTK.— The " secoudaries " may be taken to mean all the qiiills 

 of the wing, other than the first ten or eleven counting from the tip 

 inwards, -whicli are the " primaries." The secondary quills spring from 

 the forearm {radius tuid ulna). 



