The Director regrets that, owing to delays in the execution of 

 the plates, the issue of the present number has been retarded for 

 more than a month. 



ERRATA. 



On Plates I, II, III, IV, V, Yl,for Journal Mar. Biol. ass. read Journal Mar, 

 Biol. Ass. ; /or Planclie read Plate; for G. C. Bourne del read J. T. C. del. 



