"Colum. Aqu. 19. t. 16" (cited also in the 'Systema') was quoted in the
MS. from which the "vix," "subcontigui," "remotus, validus, fossula
distinctus," were absent. The "Rima" was termed "subrotunda" instead of
"cordata."
C. HEMICARDIUM. _Buc._ subquadrilaterum: valvulis carinatis, umbonibus
distantibus.
"Fasciis" was a misprint for the original "facies": "sulcis convexis"
was written "sulcis excavato-rugosis." There was no specific
appellation.
C. MEDIUM. _Buc._ subcordatum subangulatum; valvulis angulatis sulcatis
lævibus.
The prefatory remarks were the only portion of the printed description
to be found in the MS. The species was not named, but was quoted in the
'Systema' before the publication of its details.
C. ACULEATUM (misprinted "muricatum"). _Buc._ subcordatum, sulcis
convexis, linea cava exaratis, versus apicem dentatis.
The intended name was _verum_.
C. ECHINATUM. _Buc._ subcordatum, sulcis acutis exaratis linea elevata
ciliata aculeis inflexis plurimis.
"List. Ang. 188. t. 5. f. 33, Pectunculus echinatus," "Bonan. 2. t. 90,"
"Gesu. Aq. 131, 132," "Faun. Suec. 1339," "Rondel. Aq. 22," were the
original synonyms, to which our author had subsequently added "Klein,
139. t. 10. f. 40." "Alba" followed "gibba"; "parum antrorsum inflexis"
was the reading for the printed "erectis subulatis"; "extrorsum" for
the "uti extus": "brevioribus. Anus lævis, sutura simplici prominula,"
"recurvi," "fossula distinctus," were emendations.
C. TUBERCULATUM. _Buc._ subcordatum, sulcis obtusis nodosis transversim
striatis.
"Gualt. t. 71. f. M." was a correct additional synonym.