D. pubescens. Trun. antice spinis ciliatus.
D. rugosa. Trun. antice rugosus, marginibus crenatis.
The printed "cuneiformis" has replaced the earlier "majuscula"; and "crenulatis" was originally "undulatis." "Intus subviolacea est" was not in the written copy.
D. trunculus. Trun. antice lævis, marginibus crenatis.
The reference to Klein was not in the original, but "d'Arg. t. 25. f. L." was quoted (as in the twelfth edition of the 'Systema'). The last seven words printed were not in the copy. The intended name was gibbus.
D. CUNEATA. Trun. cuneiformis, marginibus integerrimis.
The final remark was not in the copy, where "parva, ovata," preceded "cuneiformis." The then unpublished details were quoted in the 'Systema.'
D. scripta. Trun. ovatus lævis scriptus.
The erroneous citation of Gualtieri (a misprint for 88. f. Q.) was not in the copy, and, as the figure represents the D. trunculus in the page opposite, I suspect was carelessly placed here by the printer, when our author had inserted it in his revised proof. I suspect this error often occurred, as for instance in Tellina planata and radiata, where Gualtieri's figure (added during revision) was attached to the former instead of to the latter. "Margo interne crenulatus," and nearly the entire account of the teeth, were emendations.
D. muricata. Trun. ovatus, striis muricatis, margine denticulato.