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.