RESUME OF THE CLASSIFICATION OF FISHES AND 
‘FISH-LIKE VERTEBRATES 
We here present a résumé of the classification of the families and higher 
groups of fishes and of the other aquatic Chordata, as adopted in this volume, 
a few slight changes being made in certain groups. The names of extinct 
families are printed in italics. 
Branch or Phylum CHORDATA 
Division PROTOCHORDATA 
Class ENTEROPNEUSTA 
Order ADELOCHORDATA 
Harrimaniidz 
Glandicepitide 
Balanoglosside 
Class TUNICATA 
Order LARVACEA 
Appendiculariid 
Order ASCIDIACEA 
Ascidiide 
Cynthiide 
Clavellinidee 
Molgulide 
* Botryllide 
Polystyelide 
Didemnide 
Distomide 
Polyclinide 
Pyrosomide 
Order THALIACEA 
Salpide 
Division VERTEBRATA 
Class LEPTOCARDIT 
Branchiostomide (Lancelets) 
Class CYCLOSTOMI 
Order HYPEROTRETA 
Eptatretide (Borers) 
Myxinide (Hagfishes) 
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