ERRATA. 
Repoet on the Nudibeanchiata (Paet XXVI.). 
Page 16, line 8 from foot, /or “ Atlantic” read “Pacific.” 
Page 31, at top, insert “Family Scylltbad/E.” 
Page 34, line 9, insert “ Family Boenellid/E.” 
Explanation of Plate IY. fig. 5, for “ in interior of, &c.,” read “ of the everted part of the glans.” 
Repoet on the Polyzoa (Paet XXX.). 
Page 4, line 3 from top, for “ Tubalipora ” read “ Tubulipora.” 
Page 29, line 13 from foot, for “ Cabarea” read “ Caberea.” 
Page 34, line 4 from top, for “ spatidata ” read “ pectogemma.” 
Page 35, line 8 from top, for “ spatidata ” read “ pectogemma .” 
Page 165, line 9 from foot, /or “ Oberoligacans ” read “ Oberoligocans. ’ 
Page 165, line 8 from foot, for “Castracaro” read “ Castrocaro.” 
Page 168, line 9 from foot, for “ Forfcala” read “ Forficula!’ 
Page 194, line 16 from top, insert “ PI. XXX. fig. 2.” 
Page 195, line 3 from foot, insert “ PI. XXXY. fig. 19.” 
Plate II. fig. 4, for “ cirratce ” read “ cirrata.” 
Plate XXXII. fig. 3, for “ Calgmophora” read “ Galymmophora .’ 
