ADDENDA ET CORRIGENDA. 



At p. 15, line 13, add " and the European Zaantliaria have been 

 fully described and rearranged by Dr. Andres." 



At p. 17, line 19, add "and by Dr. Andres." 



At p. 135, line 12, for "Oligaetis" read " Oligactis." 



At p. 176, line 10, omit " and the succeeding.'' 



At p. 222, line 31, for " Sertularia " read " Scrupocellaria." 



At p. 227, line 28, and p. 229, lines 24 and 25, for " Monodox " 

 read " Monodon." 



At p. 301, line 10, for " Millipora " read " Millepora." 



