Had the original manuscript been printed, the multitude of species confused under this appellation would have been somewhat lessened. For the cited figures of _M. inflatus_ (Rumph. t. 26. f. A. and Gault. t. 38. f. A), with that of another short-spired _Murex_ (Arg. t. 19. f. C), were separated from the rest, and quoted for a _M. unguis-odor_, the brief definition of which was "_M._ dædalens triangularis, spira ventre breviore." The published details, and the drawings of the longer-spired and more slender-bodied _Murices_ (Rumph. t. 26. f. l; d'Arg. t. 19. f. E, H.), appeared as _M. lichenoides_. I consider, then, that in that event the _M. adustus_ (Arg. t. 19. f. H.), which would tolerably suit the definition, would have been considered the typical form, and _M. axicornis_ (Rumph. t. 26. f. l, and d'Arg. t. 19. f. E.), the variety γ. M. SCORPIO. _M._ dædaleus quadrangularis, spira subcapitata. The ill-judged final remark was not in the copy. M. SAXATILIS. _M._ dædaleus quinquangularis, spira contigua. The idea of this being a mere variety was not expressed in the original. M. RANA. M. angulatus subdepressus, costis lateralibus. The R. of d'Argenville was properly referred to the variety B. The "alba", "sulcis transversis", and "Dorsum anfractum simplici cingulo aculeato" were not in the copy. M. LAMPAS. _M._ angulatus tuberculis nodosis, cauda flexuosa, labio interiore lævi. The earlier reading of "una alterave ruga" was "uno alterove denticulo." M. FEMORALE. _M._ angulato-triqueter: angulis antrorsum acuminatis. The intended name was _M. triqueter_. Grew's engravings (f. 7, 8) of the species were correctly cited, and the erroneous reference to Rumphius was not inserted. The printed additions were unimportant--"exarata", "repando", "sub" before "edentula", and "levissime". M. LOTORIUM. _M._ angulatus, tuberculis conicis, cauda flexuosa, labio interno rugoso. "Subter" was a misprint for the written "inter": the "ut in proximis" was a printed addition. M. RUBECULA. _M._ angulatus, sulcis moniliformibus, costis lateralibus, dorsalique. "Gualt. t. 49. f. I" was rightly cited as illustrative: "ex" preceded "lineis". M. RETICULARIS. _Cas._ inæqualis gibba reticulata, cauda elongata. The erroneous reference to Rumphius was not present in the manuscript. As corroborative of my expressed belief in the identity of the species described in the 'Museum' with the _Triton ! mulus_, it may be observed, that our author has wholly separated this and the allied _anus_ from the true _Tritons_ and _Ranellæ_, and that the original heading corresponds accurately with the peculiar characteristics. M. ANUS. _Cas._ inæqualis, gibba nodosa, labris rugosis. "Pet. Gaz. t. 74. f. 9" and "Pet. Amb. t. 6. f. 4" were the unprinted synonyms. The "rugis reticulato-intertextis", "irregularis", and "patens" were emendations. M. RICINUS. _M._ ecaudatus, ore utrinque dentato. "Æqualibus, ad labium majoribus" was not in the copy.