I2 4 



CHONDRICHTH YES 



Elasmobranchs which have lost the claspers, or an early offshoot 



II! fJI/g^ jfi/ t / 

 /'''' / If /as ///'''''' ^ / I 



-J~-- 



-ill Pleuracanrhodii 

 - /Cladoselachii 



Acanrhodii 



Chondrichrhyes 



DIAGRAM II. 



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

 :eological strata. Ihe actual range of distribution is shown in black ; the dotted lines indicate 

 hypothetical connections. 



sprung from the Chondrichthyan stem before claspers were developed. 

 The affinities of the Acanthodii are still less clear. 



