B. PALLIDA. _B._ spira elevata acuta, corpore cylindrico. So very many changes has this puzzling species experienced in the works of our author, that it has been thought advisable to transcribe the written description from the manuscript copy:-- Testa ovato-cylindrica, glabra. Spira convexo-conica, mucronata. Columella multum torta. Color lividus, longitudinaliter grisco undulatus. This evidently was a very different shell from the four-plaited, pale pink, and often variegated specimen described in the printed copy. The description of the outer lip, the name, and the terms "solida", "lævigata, obsoletior" were, likewise, additions of the press. B. CANALICULATA. _B._ cylindrica lævis, spiræ anfractibus canaliculatis. The entire account of this species was added to the manuscript in the Linnean handwriting. B. ACHATINA. _Buc._ glabrum, apertura integra. "Colum. Aphr. 18. t. 16" was the omitted synonym: "vel inæqualiter ovata" and the entire account of the base (merely described as "vix manifeste emarginata") were the printed additions. B. AURIS-MIDÆ. _Morion_ ovali-oblongum, spira rugosa, labio interiore bidentato. Figure 122 of Klein's seventh plate was correctly quoted as illustrative: "crudæ" preceded "niger." B. AURIS-JUDÆ. _Morion_ oblongus, spira lævi, labio interiore tridentato. B. SOLIDULA. _B._ ovata opaca striata, spira elevata. I do not doubt, from the "ovata", that _Tornatella flammea_ was the shell originally here intended; for the inharmonious account of the inner lip (as well as of the outer one) was not found in the manuscript,--from which, too, the erroneous reference to Bonanni was at first absent. The "acutiuscula" was "obtusiuscula": the "postice rotundata, antice acuta" was an improvement upon the earlier "pone gibba." B. LIVIDA. _B._ spira elevata obtusa, corpore cylindrico. This heading makes no mention of the columellar plication of the shell so named in the 'Systema,' and confirms my surmise of their distinctiveness. The name _livida_ was not originally attached to the description, but had been added (together with "obsoletis") by Linnæus, from a mistaken identification. There has evidently been some error in the comparison with _Voluta Caffra_. I suspect that _Conus bullatus_ was meant, as the contrasting characters answer admirably. "Differt a _B. pallida_ et _livida_, quod testa solida--anfractus spiræ canaliculati". This passage shows that "fragilis et spiræ anfractus obtusæ" referred to _livida_, not to _Caffra_. VOLUTA. Testa oblonga, subconvexa, basi emarginata, replicata in canalem rectum. Columella plicata oblique. Labio integro. The genus appears to comprehend precisely the same members as in the published edition. They were arranged in sections exactly corresponding with the Lamarckian genera of _Oliva_, _Voluta_, _Mitra_, and _Marginella_. V. PORPHYRIA. _V._ spira basi obliterata, labio medio retuso.