A 



B 



C D 



III. 50. — Types of Tongues 

 A, Anthrothrcptes nialaccensis. B, Anthrothreptes subcollavis. C, Australian 

 Honey-sucker. D, Honey Creeper (Arthiola). E, Penguin. F, Swan. A and 

 B after Gadow. C to F after Lucas. 



