ADDENDA ET CORRIGENDA. 
Lot 19, after “ Lambis” add a semicolon. 
27 for “ varieties” read “species.” 
140 for “ Ventricosa” read “ Inflata.” 
268 for “ Otaheitensis” read “ Otaheitanus, Brug.” 
285 for “ Obtusa” read *“* Ventricosa.” 
360 for “ Hapra” read “ Harpa.” 
369 dele the Comma between “ Cyprza” and “ Felina.” 
371 for “ punctatus” read “ punctata.” 
625 for “ Mytiliodes” read “ Mytiloides.” 
685 dele “ Triqueter.” 
764 for “ furbellowed” read “ farbelowed.” 
780 for “ wholly” read ‘* whorl.” 
781 for “ Spadicea” read * Rufescens.” 
g39 dele the Comma after “ spotted” and add it after “ variety.” 
929 for “ 2 species of the Horned Neritina” read “2 Horned species 
of Neritina.” 
973 In some copies after “ extremely” read “ fine.” 
998 for “ cuculata” read “ cucullata.” 
