QUESTIONS. 339 



What is said of the Phalangers ? of the Merian Opossum ? State 

 what is said further about the Kangaroo; about the Qrnithorhynchua 



-r 



SECTION III. 

 Class II. Birds. 



(P. 55.) WHAT is THE SECOND CLASS OF THE VERTEBRAL ANI- 

 MALS ? For what purpose are the anterior extremities of Birds exclu- 

 sively designed ? In what respect are their general form and structure 

 adapted to the same purpose? What is the construction of the heart? 

 What is a double circulation ? What peculiarity in the lungs and 

 other parts fitting them to move upon the wing ? What are the organs 

 of digestion ? Describe the crop ; the ventriculus succenturiatus. 

 What are the structure and use of the gizzard ? 



How do these vary in carnivorous Birds ? What is said of the power 

 of the eye in Birds? of the senses of hearing and smelling? What 

 is said of the habitations and habits of Birds? 



(P. 57.) Into how many orders is the class Birds divided ? Name 

 them. Wliat are the characteristics of the First Order ? What are tlie 

 two kinds? Give examples of the diurnal, and their characteristics; 

 of the nocturnal. 



(P. 58.) Name tlie Second Order, and their characteristics. Give 

 examples ; their habits. Describe the Bird of Paradise ; the Hum- 

 ming Bird. Where are the smallest found ? =4"' 



(P. 59.) What is the Third Order of the class Birds? their charac- 

 teristics ? their habitations ? food ? examples ? Describe the 

 Woodpeckers ; the Toucan. 



JVame the Fourth Order of this class. Give examples ; their charac- 

 teristics , their habits and value. In what respect are the Pigeons 

 rather an exception to the general characteristics? Give an account 

 of the most remarkable species of the Pigeon. 



(P. 60.) What is the Fifth Order ? their characteristics ? Name ex- 

 amples. Mention the striking exceptions to the general characteristic! 

 of this order. Describe the Ostrich ; the Cassowary. 



What is the Sixth Order? their characteristics? Give examples. 

 Give some account of their habits. 



