CONTENTS. 



DIVISION VERTEBRATA. 



Class PISCES. 

 Order I. DERMOPTERI. 



Suborder I. PHARYNGOBRANCHII. 



Family AmphioxidoB. 



Page 



Genus Branchiostoma 1 



Suborder II. MARSIPOBRANCHII. 



Family Myxino'idas. 



Genus Myxine 2 



Heptatrema 2 



Petromyzon 2 



Order II. MALACOPTERI. 

 Suborder APODES. 



Family Murcenida. 



Genus Muraena .... 3 



Thyrsoidea 4 



Murcenophis 4 



Family Ophisuridce. 



Genus OpJiisurus 4 



Centrurophis .'i 4 



Myrus 5 



Anguilla 5 



b 



