CONTENTS. 



Introduction . 

 marseniad.2b . 



Definition of Family 

 Anatomy- 

 Table of Genera 

 Marsenia . 

 Chelyonotus 

 Marseniella 

 Marseniopsis 

 Marsenina 

 Oncliidiopsis 

 Description of Species 

 Marsenia 



Marsenia dubia 

 Marseniopsis . 



Marseniopsis paciftca 

 Marseniopsis murrayi 



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4 

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12 

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 16 

 IS 

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 23 



(ZOOL. CHALL. EXP. PART XLI. — 1886.) 



Ss 4 



