LIST OF ILLUSTRATIONS xvii 



illustration paoe 



37. Wing of a Long-eared Owl showing the Pointed Type op 



^^ Wing Associated with Strong Powers of Flight 376 



From The Transactions of the Lirmean Society, 



38. Wing of a " Wood-Owl " showing the Rounded Type. (After 

 .Pycraft) - 377 



By permission of the Editors of The Ibis. 



39. Shoulder-girdle and Sternum op an Eagle. (After Pycraft) 379 



From The Proceedings of the Zoological Society of London. 



40. Shoulder-girdle and Sternum op a Cormorant. (After Pycraft) 381 



From The Proceedings of^ the Zoological Society of London. 



41. Shoulder-girdle and Sternum op a Boatswain-bird. (After 



Pycraft) - - 382 



By permission of the Zoological Society of London. 



42. Types op Pelvic Girdles. (After Pycraft) 387 



From The Proceedings of the Zoological Society of London. 



43. Types op Birds' Feet. (After Pycraft) 395 



From The Book of Nature Study. 



44. Types op Syrinx - - 403 



45. Forms op the Beak in the Genus Geospiza 405 



From The Transactions of the Zoological Society of London. 



46. Upper Surface of the Wing of a Little StWt to show 

 THE Overlap of the Coverts ; and Upper Surface of a Portion 

 of the Wing of an Owl to show " Diastataxic " Condition. 

 (After Pycraft) 4°? 



From The Transactions of the Norfolk and Norwich Naturalists* Society, 



47. Types of Beaks 413 



48. Ear Apertures of the Owls. (After D. Meinertzhagen) 416 



From The Transactions of the Linnean Society. 



49. Skulls of Owls, showing the Asymmetry of the Skull of 

 Tengmalm's Owl, and the Curious Differences in the Form 

 OF the Squamosal in the Young Tawny Owl and Young 

 Burrowing Owl. (After Pycraft) 4^7 



From The Transactions of the Linnean Society. 



50. Types op Tongues. (After Lucas) 4^9 



