141 



Mascarene Region. 



Drawings to illustrate Flightlessness. 



[Vol. xsxv. 



Apierornis ccBVulescens. 

 Aphanapteryx bonasia. 

 Erythromachus leguati. 

 Leguatia gigantea. 



Lophopsittacus mau7'itianus. 

 Necropsittacus borbonicus. 

 Didus cucullatus. 

 solitarius. 



to illustrate similar development in different 

 Orders. 



Fore limbs changed into paddles. 



Mammal. 



Grej Sesil (Halichcerus gry pus). 



Bird. 

 Gentoo Penguin {Pygoscelis papua) . 



Reptile. 

 Tortoise-sliell Turtle {Chelone imhricatd). 



To ILLUSTRATE MiMICRY. 



(a) Surniculus luguhris and Buchanga atra. 



(b) Oriolus buruensis and Philemon moluccensis. 



(c) Oriolus forsteni and Philemon subcorniculatus. 



To ILLUSTRATE PROTECTIVE EeSEMBLANCE. 



Desert Birds. 



Cursorius gallicus. 

 Ammomanes deserti algeriensis. 

 J, phoBnicurus areni- 



color. 

 Certhilaicda alaudipes. 

 Eremophila alpestris bilopha. 

 (Enanthe deserti homochroa. 



„ leucura syenitica. 



„ leucopyga agra. 

 Passer simplex Sahara. 



Scotocerca inquieta sahara. 

 Sylvia nana. 



„ „ deserti. 

 Pterocles seneg alius. 



„ exustus. 



„ coronatus. 



„ alchata. 



„ arenarius. 

 Syrrhaptes paradoxus. 



