Diatoms in Peruvian Guano. By F. Kitton. 477 



the remaining two being close to the opposite rays (processes). 

 The most remarkable abnormally is a valve without process or 

 av\a%, but with the former faintly indicated near the margin. 



It is only right to add that these remarks on Mr. Mills' paper 

 have been written at his request, as he does not wish an error to 

 remain uncorrected. 



