Our author himself inserted the account of this species in the manuscript. Seba was not quoted. "Habitat in Carthagena" was appended to the description. C. TIGRIS. _C._ obtusa ovata, postice obtusa. In the synonym of Rumphius, 36 is a misprint for 38: the erroneous reference to the H of Gualtieri was not in the copy, where "Pet. Gaz. t. 96. f. _7_" was indicated as illustrative. The printed additions were "aut alba," "fusco-ferrugineis" (in lieu of "fuscis"), and "s. alba, quasi exarata; postice subcylindrica, truncata"; the previous words "Linea, &c." of that sentence were also absent from the original description, but had been inserted by the hand of Linnæus. "Postice" preceded "planiusculo," and "subviolaceo" followed "nitore." C. LYNX. _C._ oblongo-ovata, linea flavescente, postice acutiuscula. No variety was mentioned in the written copy. C. ISABELLA. _C._ obtusa cylindrica, extremitatibus luteis. "Pet. Amb. t. 16. f. 16." was cited in the manuscript, where the final remark was wanting. C. ONYX. _C._ umbilicata, subtus fusca. Neither of the synonyms was quoted in the copy. C. SUCCINCTA. _C._ umbilicata, labio interiore utraque extremitate rotundato. The entire account of this shell (the _C. bicincta_ of the MS.) was added to the copy by our author. C. ZICZAC. _C._ umbilicata, subtus lutea punctis fuscis. None of the cited figures were referred to in the original, where "interiore" stood in the place of the printed "utroque fusco." C. HIRUNDO. _C._ umbilicata, supra cærulescente. "Sparsis", "s. fusca", "necnon macula, &c." were emendations of the press: "postice" preceded "fere marginato" in the original. C. ASELLUS. _C._ umbilicata alba, fasciis tribus fuscis. "Pet. Amb. t. 16. f. 18." and "Pet. Gaz. t. 97. f. 11." were cited in the copy as illustrative. C. CRIBRARIA. _C._ umbilicata, maculis albis. "Margo" preceded "adscendens" in the copy, in which "livide flavo" was found in place of "luteo": "flavicantibus" was omitted. The intended name was _C. Argiolus_. C. ERRONES. _C._ umbilicata, macula testacea æquali. _Erratica_ was the original specific appellation. C. MONETA. _C._ marginate-nodosa. "Pet. Gaz. t. 97. f. 8." and "Pet. Amb. t. 16. f. 8." were omitted in printing; "subflavescente" followed "convexo"; "subtus planiuscula" and "incisis" were absent. In place of the final remark (added, however, by the hand of our author), there originally stood "Noscitur tuberibus quinque elevatis." C. ANNULUS. _C._ marginata annulo flavo. The "s. rotundata" was added in printing. C. EROSA. _C._ marginata flava albo-punctata. "Undique aspersa" and "Macula fusca notat medium utriusque lateris" are the printed emendations. C. HELVOLA. C. marginata, postice crenata, subtus flava immaculata, supra albo punctulata. The final remark was unwritten, and the size not mentioned: "marginis gibbi" was "margine exteriore gibbo", and "subcrenati" was "latere subcrenato." C. STOLIDA. _C._ marginata variegata cinereo testaceoque.