COMPARISONS. 



With two columns, one for Bird, the other for Turtle 

 and Snake, answer the following questions: 



(1) Is the blood warm or cold? 



(2) Are feathers present? 



(3) Are there any wings? 



(4) Is there an elongate true tail? 



(5) Are the carpus and tarsus long or short? 



(6) Are air-sacs present? 



(7) How many aortic arches? 



(8) How many ovaries? 



Read the accounts of Reptiles (pp. 342 to 350) and 

 Birds (pp. 350 to 363). 



On a second sheet, with columns for Birds and Reptiles, 

 answer the following questions: 



(1) Are scales present? 



(2) Are claws present? 



(3) How many occipital condyles? 



(4) Is there a distinct quadrate bone connecting the 

 upper jaw with the skull? 



(5) Are true ribs present? 



(6) How many chambers to the heart? 



(7) What is the size of the eggs? 



(8) Are functional gills ever developed? 



(9) Do the urinary and reproductive ducts empty into 

 the hinder part of the alimentary canal? 



Read the account of the Sauropsida (p. 342). 



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