SCHEME OF CLASSIFICATION 



III. CEPHALOCHORDATA (pp. 4, 112). 



IV. CRANIATA (pp. 4, 141). 



Family. 

 Braiichiostomatidae 

 (p. 137). 



Sub-Class. 



Class — Cyclostomata (pp. 145, 150, 421). 

 Order. Sub-Order. 



Myxinoides (p. 421) 

 Petromyzontes 



Family. 

 / Myxinidae (p. 422). 

 \^ Bdellostomatidae (p. 42-3). 



(p. 426) 



Petrorayzontidae (p. 426). 



Class— Pisces (pp. 145, 4-31). 



ELASMO- 

 BRANCHII 



(p. 4.31) 



Pleuropterygii 



(p. 436) 



ICHTHYOTOMI 



(p. 438) 



ACANTHOIJEI 

 (p. 440) 



'Selachii(p. 442) - 



Plagiostomi (p. 442)- 



TELEOSTOMI 



fp. 475) 



Holocephali (p. 466)- 



Crossopterygii 



(p. 476) 



Chondrostei 



(p. 485) 



OSTEOLBPIDA 



(p. 477) 

 Cladistia (p. 48i; 



[Continued on the next page. 



Batoidei (p. 457) 



CladoselacMdae (p. 438). 



Pleiiracanthidae (p. 440). 



j' Biflacanthidae (p. 441). 

 ( Acanthodidae (p. 441). 



Notidanidae (p. 442). 



Clilamydosolachidae (p. 443). 



Heterodontidae (p. 444). 



Cochliodontidae (p. 445). 



Psammodontidae (p. 446). 



Petcdodontidae (p. 446). 



Scylliidae (p. 446). 



Carchariidae (p. 448). 



Sphyrnidae (p. 449). 



Lamnidae (p. 450). 



Cetorhinidae (p. 453). 



Rhinodontidae (p. 454). 



Spinacidae (p. 454). 



Rhinidae (p. 456). 

 . Priatiophoridae (p. 457). 

 ' Pri.stidae (p. 459). 



Rhinobatidae (p. 460). 



Raiidae (p. 461). 



Tamiobat'idae (p. 462), 



Torpedinidae (p. 462). 



Trygonidae (p. 464). 

 , Myliobatidae (p. 465). 

 [ Ptyetodontidae (p. 468). 

 I Squaloraiidae (p. 468). 

 'j Myriacanthidae (p. 468). 

 I, Chimaeridae (p. 468). 

 [ Osteolepidae (p. 477). 

 I PJdzodontidae (p. 478). 

 1 Holoptychidae. (p. 479). 

 I. Ooelacanthidae (p. 480). 



Polypteridae (p. 481). 



Palaeoniscidac (p. 486). 



Plalysomidae (p. 487). 



BelonorhyncMdae (p. 488). 



Catopteridae (p. 488). 



Chondrosteidae (p. 489). 



Polyodontidae (p. 491). 

 . Acipenseridae (p. 492). 



