COKEECTIONS. 



P. 48, 6th line from bottom. " Tubularia " should be " Tubipora." 



P. 53. Delete paragraph " C," also the whole of the last five paragraphs of the 

 same article from the words " so much for collateral evidence." This is 

 necessary as the dorsal processes or " tentacles " of Sabella are now known to 

 be processes of the collar, and thus are not homologous with the operculum 

 of Serpula. 



Plate numbered "Vol. 2, PI. V." and which precedes p. 89. In the explanation 

 facing, for "Figs. A to D, Plumularia pumila" read "Figs. A to D, 

 Sertularia pumtta." 



