STROMBUS exustus 134 lentiginosus ib. tricornis 135 lobatus 153 CYPRAEA spadicea 182 sanguinolenta ib. EBURNA Valentiana 144 tessellata 145 Pacifica 146 VOLUTA punctata 161 pusio 181 TURBINELLUS spirillus 177 _Bivalves._ PINNA bullata 158 ANODON purpurascens 160 crassus 167 elongatus 176 UNIO fragilis 171 * * * * * ADDENDA ET CORRIGENDA. In the Systematic Index, Conchology, Part I. for "_Acephalis_" read "_Acephales_." Pl. 92. page 1. line 13, for "_caudi_," read "_caudis_." 23, for "_Dentatis_" read "_Dentati_." -- 3. -- 11 from the bottom, for "_Lepidopterae_" read "_Lepidoptera_." -- 102. Add to the Synonyms, _A. virginea_. _Lamarck. Syst._ _tom._ 6. _part_ 2. _p._ 131. _Sowerby's Genera._ _Achatina_, _f._ 2. -- 124. last line, for "female" read "male;" and in the line above, for "male" read "female." -- 125. for "_P. Nireus_" read "_P. Nerius_." -- 126. Add to the Syn. _Lam. Syst._ 7. _p._ 467. 55; and for _Ency. Meth._ _pl._ 326. _f._ 204., read _pl._ 326. _fig._ 2 and 4. -- 127. Add to the Syn. _Lam. Syst._ 7. _p._ 465. 50. -- 134. _Strombus exustus_, described by Lamarck (_Syst._ 7. _p._ 211) under the name of _S. Papilio_. The first of these names, however, has the right of priority. (See _Mus. Cal._ 1797.) The figures of Martini, tom. 3. tab. 8. f. 825, 826, clearly represent this species; although Lamarck has quoted them for _S. lentiginosus_. _Strombus lentiginosus._ Add to the Synonyms, _Lam. Syst._ 7. _p._ 203. _Knorr_, 3. _tab._ 13, _f._ 2. Lamarck has omitted to quote any of the figures representing the young shells of this and the following species. -- 135. _St. tricornis._ Add to the Syn. _Lam. Syst._ 7. _p._ 201.