Few of the details were present in the original copy, but appear to have been added, to discriminate the species from the allied _gibberulus_. "Spira obtusa brevis" was added by the hand of Linnæus; "sæpe subplicati", "postice lobo obsoleto instructum", "intus", "Columella nigricans", "Cauda nulla, sed postice emarginata", were all absent from the MS. S. GIBBERULUS. _Har._ labio inermi dorso lævi, spira repanda. The printed additions are "subtus planiuscula", "læves", "fuscum", and the final remark. S. LATISSIMUS. _Har._ labio inermi rotundato, spira subnodosa breviore, dorso lævi. S. EPIDROMIS. _Har._ labio inermi dilatato, dorso lævi, spira subnodosa. The _S. epidromis_, as it originally stood in the manuscript, was a recognizable species, and precisely identical with the shell so named in the 'Systema'; for the erroneous reference to Gualtieri was not present, neither was "carinato," nor any of the discordant details from "interius" to the termination. As the printed description now stands, it would suit _S. emarginatus_ or _succinctus_, at the least, equally well. I doubt not our author, when correcting the press, forgot his own species, and added the partial essentials of one species to those of another. S. CANARIUM. _Har._ labio inermi dilatato, dorso spiraque lævibus. The erroneous reference to plate 37 of Rumphius was not present in the written copy, which contains the additional synonyms of "Pet. Gaz. t. 98. f. 11", and "Klein, t. 4. f. 73": the latter was not there originally. The early description has been improved, in the press, by the addition of "obovata", "Faux lævis, alba", and "longitudinaliter subundulatus." S. VITTATUS. _Har._ labiis inermibus, spiræ anfractibus vitta interstinctis. S. URCEUS. _Har._ labiis inermibus striatis, dorso nodoso. The erroneous reference to Gualtieri was not present in the original, but in place of it the 37. W. of Rumphius (_S. mutabilis_): "Spira testa brevior, plicato-subnodosa" was, likewise, absent. "Klein, 49, urceus fimbriatus" (a name for Rumph. t. 37. f. F & W) was interpolated by our author. S. ATER. _Turricula_ labiata. Neither the reference to Rumphius, nor the "et postice emarginatum" were found in the original. This confirms my expressed belief that the Museum species (to which no name was at first attached) was distinct from that of the 'Systema.' S. LIVIDUS. _Turric._ labiata, anfractibus serie subspinosa. This was located in a section of _Turricula_ distinguished as having the outer lip dilated and rounded. * * * * * Besides the above, the following unprinted details were found in the manuscript:-- The _Strombus gigas_ was described at length under the appellation of _Harpago gigas_. _Har._ labio inermi rotundato, dorso spiraque subulato-spinosis. Gualt. t. 34. f. A. Bar. Icon. 1727. f. 7.