part 4] 



OF THE MIOCENE OF CEYLON. 



597 



The age and distribution of this species have been discussed in 

 the general part of this paper (p. 58s ). 



It is sometimes assigned to the genus Loplia or Alectryonia, 

 of which the genotype is Myfilus erisiayalli Chemnitz, but 







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which, as usually understood, appears to me to be a very poly- 

 phyletie 'genus'. The same criticism may quite fairly be passed 

 on the ' genus ' Ostrea ; but, where neither of two names is satis- 

 factory, it is better to use that which is more familiar. 



