BIRD. 51 



in various stages of growth. Can you trace the ducts from 

 either kidneys or reproductive organs? Where do they 

 end? Are the reproductive organs paired? 



Open the skull very carefully, beginning at the top and 

 working down on the sides. If the head be cut off and 

 put in alcohol for twenty-four hours or more after opening 

 the skull, the parts of the brain will be better made out. 

 In front are the cerebral hemispheres, with the olfactory 

 lobes showing in front and below. Inserted in the angle 

 between the two hemispheres is the cerebellum, and on 

 either side of the latter, and partially covered by the 

 cerebrum, are the optic lobes. What has become of the 

 'twixt-train? Do you find the medulla? Are all the 

 parts of the brain smooth? Draw the brain from above 

 and from the side. 



The essential features of the skeleton can be made out 

 from the same specimen after boiling. The parts neces- 

 sary' are the head, the shoulder-girdle, wing, leg, and a 

 few of the vertebrae. What is the shape of the ends of 

 the vertebrae? In the shoulder-girdle what parts can you 

 recognize? What name must be given to the wish-bone, 

 or furculaf (compare the frog). In the wing humerus, 

 radius, and ulna are readily made out. How many carpal 

 bones do you find? In the 'hand' how many fingers can 

 you distinguish? Sketch the carpus and 'hand/ with the 

 ends of radius and ulna. In the leg recognize femur, 

 tibia, and fibula. Where is the heel? What must the 

 bone above the toes be? 



Are the bones distinct in the skull? Move the beak 

 upon the skull. Where do the bones slide? Connecting 

 the angle of the upper jaw with the skull is the quadrate 

 bone. Is it movable? 



