The Cambridge natural history, Vol. 03 (of 10)Note 342 — Chapter IX · THE SHELL, ITS FORM, COMPOSITION AND GROWTH—DESIGNATION OF ITS VARIOUS PARTSReading editionT. Scott, Journ. of Conch., 1887, p. 230.◇Copy noteReturn to CHAPTER IX THE SHELL, ITS FORM, COMPOSITION AND GROWTH—DESIGNATION OF ITS VARIOUS PARTS