2lO ZOOLOGY. 



2. Compare the ccelom of Scyllium, Rana and Lepus. 



3. Compare with one another the breathing organs and 

 the mechanism of respiration in a frog and in a rabbit. 

 Give figures showing the condition of the heart and 

 great arteries in these animals, and indicate in each 

 case the nature of the blood in the several cavities of 

 the heart; 



4. Draw diagrams, with the parts named, illustrating the 

 arrangement of the chief arteries of (a) the frog, (b) the 

 rabbit, (c) Compare briefly the arrangements thus de- 

 scribed, (d) In what important respects does the vascular 

 mechanism of the frog differ from that of the fish, in corre- 

 lation with the presence of lungs ? 



5. Describe, with diagrams, the nervous system of Amphi- 

 oxus, and compare its nervous axis, in detail, with that of 

 a Vertebrate (Craniate). 



6. Give a brief account of the physiology of respiration. 

 Describe fully the means by which respiration is effected in 

 the following animals : frog, Amphioxus, rabbit, and dog- 

 fish. 



7. Describe the minute structure of the blood of the 

 rabbit, frog, and Amphioxus. 



8. Give an account of the structure (including histology) 

 of the spinal cord and spinal nerves of the frog. 



9. Compare the vertebral column of the dogfish and 

 rabbit. 



10. Compare the circulation in the kidney of dogfish and 

 rabbit. 



11. Compare the skull of the frog with that of the dog- 

 fish. To what structures in the dogfish do membrane 

 bones correspond ? 



12. Describe the form and divisions of the central 

 nervous system in Amphioxus, the dogfish, the frog, and 

 the rabbit. 



13. Describe, with diagrams, the arrangement of the 

 urinary and generative organs in the male of (a) the rabbit, 

 (i) the dogfish, and (0) the frog; (d) point out the most 

 important differences between them. 



14. Compare, one by one, the cranial nerves of the dog- 

 fish with those of any higher Vertebrate, as regards their 

 origin and their distribution. 



