CHART showing the distribution and relative frequency of &Litta and Ctenoplwra,( including the Hydromedu.sa,)m the Firth of Forth, as indicated by the records of 



these organisms in the Lists of tow net gatherings referred to in the preceding notes. 

 Black Lines == Sagitta ,- Red Lines 1= Ctenophora . Thick Lines = Bottom tow net ; Thin Lines = Surface tow net 



PLATE V. 



