Testa ovata lævis involuta. Apertura linearis, utrinque dentata. Spira
occultata intra testam.
C. MAPPA. _C._ subturbinata characterisata, macula longitudinali
dentata.
"Pet. Amb. t. 16. f. 2." was an omitted synonym. The terminal remark
is an improvement upon the earlier "Noscitur linea utrinque dentata in
superficie scripta."
C. ARABICA. _C._ subturbinata characterisata, macula longitudinali
simplici.
"Denticulis testaceis" and the description of the variety were
additions by the hand of Linnæus.