xu 



LIST OF SPECIES. 



Sub-ord. III. Cyclostomi, 142 

 Fam. I. Petromyzonid^, 142 

 i. Peteomyzon, 143 



1. Petromyzon marinus, 143 

 ii. Lampetra, 143 



1. Lampetra fluviatilis, 144 



2. Lampetra Planeri, 144 

 iii. Ammoccetes, 144 



1. Ammoccetes bran chialis, 145 



Fam. II. Myxinid^, 145 

 i. Myxine, 145 



1. Myxine glutinosa, 145 



Fam. III. Amphioxid^, 146 

 i. Beanchiostoma, 146 



1. Branchiostoma lanceolatum. 

 146 



