By a slip of the pen, in my "Ipsa Linnæi Conchylia," I had termed Brown's figure of the Linnean _Mya lutraria_, _L. oblonga_, instead of _L. elliptica_. M. PERNA. _Myt._ lævis, cardine terminali unidentato. The intended name was _M. Magellanicus_. M. VULSELLA. _Sol._ oblongus, linguæformis, cardine terminali dilatato semiorbiculato. "Pinna linguaformis subfalcata" was written after the reference to the 'Museum Tessinianum;' hence it seems that Linnæus did not himself consider that he had used the binomial method in that work, or he would have quoted it as _P. lingulata_. "Rumph. 148. t. 46. f. A," and "Gualt. t. 90. f. H," were the unpublished synonyms. SOLEN. Testa valvulis utrinque hiantibus. Cardo dente unico inflexo recurvo. The _Mya lutraria_, _M. vulsella_, and _Pholas crispatus_ were originally included in this genus. S. VAGINA. _S._ linearis rectus, cardinibus unidentatis. "Habitat in Indiæ littoribus arenosis: in mari Rubro (_Hasselquist_)" was the recorded locality in the MS., where the European shell delineated by Gualtieri was not then included: "Klein, 163. t. 11. f. 65" (a copy from the cited figure of Rumphius) was its substitute. S. SILIQUA. _S._ linearis rectus, cardine altero bidentato. The wretched drawings of Argenville were not quoted; but "Bonan. 2. f. 56" (error for 57), "Plane. t. 3. f. 6," and "List. Ang. 192. t. 5. f. 37," were cited instead. S. ENSIS. _S._ linearis subarcuatus, cardine altero bidentato. The final remark was not in the MS. S. CULTELLUS. _S._ ovali-oblongus curvatus. "Habitat in Amboinæ littoribus arenosis" is an addition of the MS. The intended name (derived from Rumphius) was _cultriformis_. S. RADIATUS. _S._ ovalis, cardinis costa tereti. "Habitat in littoribus arenosis Xulii(?) Amboinæ" is an addition to the published account. The intended specific name was _violaceus_, an appellation bestowed upon it by Rumphius: "_solida_" was an emendation. S. STRIGILATUS. _S._ ovalis, oblique striatus. "Bonan. 2. f. 76" (error for 77) was an unpublished synonym. S. ANATINUS. _S._ ovatus membranaceus, costa falcata. _Rostrum anatis_ was the intended name. TELLINA. Testa altero latere inflexa. Cardo dentibus aliquot, raro lateralibus. T. GARGADIA. _T._ antice rugosa, rima dentata. The absurd "marginis posticum latus remotum" was a misprint for (dens) "marginis posticus, latus, remotus." T. LINGUA-FELIS. _T._ subovata scabra. "Klein, t. 11. f. 62" (cited in the 'Systema'), and "d'Arg. t. 25. f.G" (the description of which suits better than the drawing) are the additions of the MS.: "sesquilatiore" was the printed emendation of "latiore." T. VIRGATA. _T._ ovata, striis transversis retrorsum imbricatis, dentibus lateralibus.