FISHES OF THE EAST COAST OF NORTH AMERICA. 



Class C— MARSIPOBRANCHIL 



Order 11. — Hyperoartia. 



791 



Sub-order. 



Super-family. 



Family. 



PetromyzontidiE. . (106) 



Sub-family. 



Petromyzontinaj. 



GeuuB. 



PetromyzoD (Linn.) Gray. 

 AmmoccBteH (Dum.) QUI. 



Order 12. — Hyperotreta. 



Myxinidae (107) 



Myxine Linn. 



Class D.— LEPTOOARDII. 

 Order 13. — Cirrostoml 



BranchiostomidsB. (108) 



Branchiostoma Cotta. 



