114 GENERAL BIOLOGY. 



6. The pyloric appendages, finger-like organs 



opening into the alimentary canal at the 

 junction of stomach and intestine. 



7. The spleen, a dark red body lying in one of 



the loops of the intestine. 



8. The reproductive organs. 



9. The air-bladder. 

 Diagram ! 



Cut through the intestine an inch from the anus 

 and through the hepatic veins close to the liver, 

 and remove all the organs thus far seen except 

 the air-bladder. 



Cut through the air-bladder (noting the rete 

 mirabile on its ventral ivall) to see : 



10. The kidneys, elongated red organs pressed 



close to the dorsal wall of the abdominal 

 cavity, one on each side of the vertebral 

 column. Put a bristle into the outer open- 

 ing of the ureter and trace it to the kid- 

 neys. 

 Find: 



11. The genital duct. 



Diagram of the kidneys and reproductive organs. 

 III. Circulatory System. 



Dissect away the left half of the pelvic and pec- 

 toral girdles from below upward, not injuring 

 the veins. 

 Observe : 



