The synonymy, as might be expected (for Seba was unknown to Linnæus when the descriptions were written), was not in the original. M. COCHLIDIUM. _Strom._ spira pyramidata, anfractibus planis. The reference to Seba, the name, and the "Cauda subulata, longitudine testæ" were not present. M. CANALICULATUS. _Strom._ spira subconvexa, anfractibus distantibus. The "Anfractus distincti canaliculo per omnes spiras," the name, and the reference to Seba, were the printed additions. "Habitat in Canada. Kalm." was appended. M. ARUANUS. _Strom._ incurvus spinosus ventricosus, angulo obsoleto. The objectionable name (for assuredly the _Buccinum Aruanum_ of Rumphius suits not "spinosus") was not present in the original, but had subsequently been added by our author, who seems to have erased the original "Habitat in Canada. Kalm." I doubt not that _Pyrula carica_ was intended. M. PERVERSUS. _Strom._ inversus. The wretched engraving of Gualtieri was not cited. M. TRITONIS. _Cas._ pyramidalis lævis, columella dentata. "Bonan. 3. f. 188" stood in the place of Seba. The printed additions were "plerisque", "et suturis variis alternis crassis", and the specific epithet. "Genus difficile eruitur" was written after the description, and the following note erased:--"Ad genus retuli ob labium interius adnatum in quibusdam latius, ob suturas verrucosas, ob caudam canaliculatam parum elevatam, ob labium postice dentatum, quæ omnia affinitatem arguunt." The _Triton nodiferus_ was probably designed by the following description, which succeeded that of _M. Tritonis_:-- _Cas._ (corrected by Linnæus to _Murex_) _Neptuni_. _C._ pyramidalis nodosa, columella dentata. Testa maxime facie statura et colore præcedentis. Anfractuum angulus summus nodis prominentibus, unde et spira nodosa evadit, quod non in præcedente. Apertura præcedentis. Labium interius magis dilatatum, maximeque planum. Columella non dentata. Habitat Constantinopoli. Edw. Carleson. M. TRAPEZIUM. _Strom._ spira nodosa, labio denticulato, columella rugosa. M. ALUCO. _Turric._ recurvirostra, spinosa, serie simplici. Gualtieri was not cited, and the reference was to "N. Strombus tuberosus" (_Cerithium aluco_), not O. (_C. nodulosum_) of Rumphius. The inner lip was described as "non adnatum, sed prominens": "s. fuscis", and "Variat cauda recta, &c.", were not in the original. Besides the published species, the following had been written, but omitted in printing:-- TURRICULA ALBA. _T._ alba recurvirostra, anfractibus margine crenulatis. Bon. 3. t. 84. Rumph. t. 30. f. K. Pet. Gaz. t. 56. f. 4. d'Arg. Conch. t. 14. f. P. Gualt. Test. t. 57. f. D. Testa lævis. Anfractus circiter 15, margine subcrenati. Color albus, sæpius saturatior ad marginem anfractuum. Apertura ovata, rostro canaliculato, recurvo. Labium interius adnatum, dente unico obsoleto. This was evidently identical, from its synonymy, with the _M. vertagus_ of the 'Systema.'