458 ZOOLOGY. 



30. Describe and compare the excretory apparatus of 

 Lepus or Rana, Astacus, Lumbricus, and Anodon. 



31. Describe the heart of Astacus, Scyllium, Rana, and 

 Lepus, with especial reference to the relationship of each 

 to the great vessels and vascular channels. 



32. What are the phenomena characteristic of sexual 

 reproduction? Describe any case with which you are 

 familiar, and contrast one of asexual reproduction. 



33. Describe and compare the nervous system of 

 Anodonta, Lumbricus, and Astacus. 



34. How is respiration effected in Lumbricus, Amphi- 

 oxus, and Scyllium? Describe the organs concerned in 

 each case. 



35. Describe the excretory apparatus of Lumbricus and 

 compare with it that of Astacus and of Anodon. 



36. Describe the integument of Lepus, Scyllium, and 

 Astacus. 



37. Give a general account of the structure and life- 

 history of Paramecium. 



. 38. Explain the meaning of the following terms : 

 metabolism, assimilation, secretion, coolom, metamere, 

 gamete. 



