Testa gibba, maxima, magnitudine capitis. Cauda obtusa. Spira spinis patentibus, subulatis, validis. Anfractus desinens in dorso spina. Series in dorso spinarum maximarum ferme conicarum. Labium dilatatum, rotundatum, spira longius, vix adnatum spiræ. Faux glabra, nitida, incarnata. Color pallidus. The _Strombus dentatus?_ was also defined (without a specific appellation) by the following characters:-- _Har._ labio dentato, testa lævis, plicato-nodosa. Testa simillima reliquis, longitudine articuli digiti, lævis, flavescens, subplicata, plicis antice acuminatis nodis. Spira acutiuscula, similiter plicata, nodosa. Labium exterius minus dilatatum, postice margine dentatum et interne fuscum, striatum. Labium internum crassum, integrum, læve. The _Strombus palustris_, although not published until the twelfth edition of the 'Systema,' had been already defined in the 'Museum' as _Turricula cornea_. _Tur._ decussatim rugosa, labio dilatato. Rumph. 101. t. 30. f. Q. Strombus palustris. Testa crassa, rudis, pyramidalis, cornea aut plumbea, anfractibus 12 et ultra, secundum spiras transversim aliquot striis exarata, longitudinaliter subplicata, adcoque sine spinis rugosissima. Labium dilatatum, rotundatum, concavum, edentulum. MUREX. The definition of this genus ran as follows:-- Testa subovata, spinosa. Apertura coarctata, ovata, desinens in canalem tubuloso-conniventem. This was evidently designed for the _Murices_ proper. The other species of the 'Museum' were distributed in the groups of _Cassis_, _Turricula_, _Bulla_, and _Strombus_. The last was defined as follows; "Testa obverse conica, nodosa, labium exterius angulum transversalem superne formans; interius nullum. Columella incurva. Cauda integra." M. HAUSTELLUM. _M._ caudatus, subinermis, nodosus. "Suturis" was originally "costis". The printed emendations are "gibbis, adglutinatis", "costati et nodosi", "subtus rima longitudinali clausa", "margine", and the final remark. M. TRIBULUS. _M._ caudatus spinis subulatis trifariis. "Olear. Mus. t. 39. f. 1" was cited in the transcript, to which Linnæus had added "Bonan. 269" and "List. t. 902. f. 22", all which synonyms are present in the 'Systema.' The printed additions are "suturis 3 longitudinalibus, adglutinatis, incrassatis", "secundum suturas: superficies transversim striis elevatis distinctis", "recta". M. CORNUTUS. _M._ caudatus, spinis subulatis serie gemina. The s. in the reference to Rumphius was a misprint for the written 5: "Pet. Gaz. t. 68. f. 12" (as in the 'Systema') was present in the copy. The expressions "striata", "conicæ", "obliquo situ", and the final remark, are the printed additions. M. TRUNCULUS. _M._ subcaudatus, spinis simplici serie. The description of the tail and account of the variety were not originally present: "suturis" was, at first, "plicis", and "adglutinatis" was "antrorsum adnatis". M. RAMOSUS. _M._ dædaleus triangularis, spira longitudine ventris.