B. ERINACEUS. _Cas._ subsulcata, antice nodosa, labio edentulo, postice extrorsum denticulato. The entire account of this _Cassis_ was interpolated by Linnæus in the pages of his amanuensis. B. GLAUCUM. _Cas._ glabra, antice muricata, labio dentato, postice extrorsum denticulato. The superfluous A in the reference to Gualtieri was a misprint: "inferne" was "interne": the "acuminata" and "marginatum" were emendations. B. VIBEX. _Cas._ glabra, labio edentulo, postice extrorsum denticulato. The figures 8 and 9 of Rumphius were not cited. B. PAPILLOSUM. _Cas._ papillis decussatis, labio tenui, extus denticulato, fauce glabra. "Rectum" followed "exterius" in the written copy, wherein "s. albidus" and "antice sinu excavata" were not to be found. B. GLANS. _Morion_ labio exteriore denticulato, interiore bidentato. "Labium exterius margine postico denticulato" was omitted in printing. B. ARCULARIA. _Cas._ longitudinaliter sulcata, labio exteriore tenui, interiore maximo. B. COSTATUM. _Lyra_ costis longitudinalibus, antice prominulis, alternis obsoletis. This diagnosis but ill suits the _Many-ridged Harp_, which, of late, has been considered identical. B. HARPA. _Lyra_ costis longitudinalibus antice mucronatis. The shell is described in the MS. as "striata subtilissime longitudinaliter", and "Pet. Amb. t. 2. f. 2", "Pet. Gaz. t. 48. f. 13" (the latter quoted also in the 'Systema') are there substituted for the reference to Gualtieri. The printed additions are considerable; to wit, "costæ vero striis transversis", "anfractibus costis mucronatis", "denticulatum." B. PERSICUM. _Lyra_ læviuscula, labii margine crenulato. The erroneous citation of Grew (t. 9. f. 5, 6) in the 'Systema' had been adopted in the manuscript. B. PATULUM. _Lyra_ muricata spinis obtusis. Neither the erroneous reference to Gualtieri, plate 51. f. A (which was designed for _Purpura hæmastoma_), nor the "color interne rufescens", is to be found in the manuscript. B. SMARAGDULUS. _Lyra_ glaberrima, columella denticulata. Neither the erroneous reference to d'Argenville, nor the specific name derived from his figure, is to be found in the MS. The proposed appellation was _L. vitrea_. "Simillima Cassid, lapillo, sed glabra, et columella crenata" is the unprinted remark. B. SPIRATUM. _Morion_ umbilicatus, anfractibus distinctis canaliculo. The specified colouring was "alba, maculis longitudinalibus fuscis"; "pone bifidum" followed "integrum." The intended name was _M. canaliculatus_. B. GLABRATUM. _Morion_ umbilico descendente flexuoso. d'Arg. Conch t. 12. f. G. "Testa oblonga, acuminata, obtusiuscula, glaberrima, anfractibus confluentibus, Neritarum maximarum pondere. Color albo-flavescens, nitidus. Apertura obliqua, profunde emarginata. Labium exterius integerrimum. Labium interius antice reflexum adnatum, dein solutum brevius flexuosum, descendens ad basin. Sulcus profundus distinguit basin testæ. Umbilicus pone labium interius descendens ad basin sulco".