The printed description and the synonymy are so very dissimilar to the written one, that I entertain no doubt that an early definition of _T. Niloticus_ (with references to "Olear. Mus. t. 9. f. 5" and "Bonan. 3. f. 102") was transmuted into that of a granular species, by the addition of "quasi granis exasperata," &c. T. SOLARIS was not mentioned in the manuscript. T. PERSPECTIVUS. _T._ crenato-umbilicatus convexus obtusus: margine acuto. "Bonan. 3. f. 27, 28" was quoted, as illustrative: "costa crenata" not "costa concava", was the earlier reading. T. HYBRIDUS. _T._ crenato-umbilicatus, convexus, undique obtusus. The proposed name was _T. spurius_. The "absque carina, rotundata" was "absque angulis, glabra": "albo, flavoque" preceded "variegata". T. PHARAONIUS. _T._ umbilicatus subovatus striatus, punctis globulosis, labio dentato. "Habitat in mari rubro, frequens. D. Hasselquist." was written: the final remark was absent. T. MAGUS. _T._ umbilicatus convexo-conicus nodosus. The "cinereo nebulosa" was a manuscript emendation by Linnæus. T. MURICATUS. Except that "obverse" precedes "ovata", both the diagnosis and the details are precisely similar to the printed account. T. SCABER. _T._ umbilicatus subovatus, sulcis alternis majoribus moniliformibus. The erroneous figure of d'Argenville was not cited in the original, nor, indeed, was any name attached to the description. The whorls were said to number from 6 to 8 (not 4 or 5); and the aperture was termed "ovata," not "subrotunda." "Pallida", the final remark, and the present construction and enlargement of the passage relative to the inner lip (which at first ran thus, "Labium posticum coadunatum, sinu postico excisum"), had been added by Linnæus himself. T. LABIO. _T._ exumbilicatus ovatus striato-tuberculatus, labio dentato. The erroneous figure of d'Argenville was not cited; "variegata" was the earlier reading of "marmorata"; "aliquot" of "et punctis"; "externo" of "margine". Linnæus himself had enlarged the account of the inner lip from the earlier "postice sinu excisum" to its present length. T. ZIZYPHINUS. _T._ umbilicatus conicus, striis papillosis. This is clearly not the imperforated _zizyphinus_ of the 'Systema.' Gualtieri was not referred to; "ambitu marginati", and "in aliis clausus", were not in the copy: "columella parum obliqua" was an addition in the Linnean handwriting. T. TELESCOPIUM. _T._ exumbilicatus pyramidatus, striis exaratus; labio postice recurvato, spirali, integro. "Bon. 92", and "Klein 26. Pseudotrochus striatus", were the additional synonyms of the MS. T. DOLABRATUS. _T._ umbilicatus, labio postico recurvato sulcato, ovato-pyramidalis, glaber. The whorls were at first called imbricated. The "basis rotundata", and "in superioribus vero unica", had been added by Linnæus. TURBO. Testa conica. Apertura orbicularis, integra. T. PERSONATUS. _T._ exumbilicatus inermis convexus, labio postice diducto.