I2 4 



CHONDRICH TH \ 7 ES 



Elasmobranchs which have lost the claspers, or an early offshoot 



Chondrichrh yes 



Diagram II. 



Diagram illustrating the Phytogeny of the Chondrichthyes, and their distribution in the 

 geological strata. The actual range of distribution is shown in black ; the dotted lines indicate 

 hypothetical connects ins. 



sprung from the Chondrichthyan stem before claspers were developed. 

 The affinities of the Acanthodii are still less clear. 



