QUESTIONS. 123 



73. F.y what moans are the fry of the oyster removed to a 



distance from tin; parent lied ? 

 7-1. K\ plain the IITIII /irttc/t'm/mdtt. 

 7-"). Give < \.-inip!' B of this class. 

 70. (Jive an account of the distribution in time of the Dnn-ti'"^ 



ppda, 



77. What is their usual habitat? 



78. Dr:-;cribi: tin; bradl i' >pod .shell. 



7i>. I low are the valves opened and clo.-;ed? 



50. What, is \.\\<>. /><:/nncle? 



51 . Describe the til-nix, and state u hat is their supposed function. 

 Si'. (Jive ;m account of their di;.: st ive apparatu.j. 



s;;. \Vhat is known of the circulation? 



84. What is meant by the afrial M/atem ? 



S."). \\'liat is ilie nature of the respiration ? 



SU. ( live an account of the nervous system. 



87. Into what two gro-.ips are they divided? 



88. Give an account of the Tuiticuta or Axcidloida. 

 S!. Ivx plain th<-:^e terms. 



t(). Distinguish between simple, social, and compound aseidians. 

 HI. DI -;<]]!)(; the text, and state what vegetable substance it 



contains. 



!>_>. ( Jive- an account of the In-nncli'ml ynr and the atrlal chamber. 

 !>;*. \Vhat is the nature of the circulation? 



1M-. How is th<; blood purilicd ? 



I)."). What is the nature of the nervous system ? 



!)(>. Show that the larvie in some groups differ widely from the 



' animals. 



1)7. What are Hie /V//;.on? 



l)S. (live examples. Why are they sometimes called zoophytes? 



!W. (Jive a general description of these animals. 



100. How do they differ from the Ifydrozoa? 



101. What is meant by gemmation? 



102. What are avicular'i<i .' 



103. K.\ plain i>o////>'lc, />o/>/-f,</r'uim t cctocyst, endocyst. 



104. What is the nature of the digestive apparatus ? 



105. 'What i.s known of the circulation and respiration? 



106. (Jive an account of the nervous system. 



107. How are new colonies funned? 



