No variety was mentioned in the written copy.
C. Isabella. C. obtusa cylindrica, extremitatibus luteis.
"Pet. Amb. t. 16. f. 16." was cited in the manuscript, where the final remark was wanting.
C. onyx. C. umbilicata, subtus fusca.
Neither of the synonyms was quoted in the copy.
C. succincta. C. umbilicata, labio interiore utraque extremitate rotundato.
The entire account of this shell (the C. bicincta of the MS.) was added to the copy by our author.
C. ziczac. C. umbilicata, subtus lutea punctis fuscis.
None of the cited figures were referred to in the original, where "interiore" stood in the place of the printed "utroque fusco."
C. hirundo. C. umbilicata, supra cærulescente.