[71]. “Die Perlenmuscheln,” Leipzig, 1859, pp. 294, 295.
[72]. Harley, “Proceedings of the Royal Society of London,” Vol. XLV, p. 612.
[73]. “Historia Naturalis,” Lib. IX, c. 35. This is also referred to by Macrobius in Saturnaliorum conviviorum Lib. II, c. 13.
[74]. Now in the French crown brooch in the possession of the Princess Youssoupoff of Russia.
[75]. See p. 465.
[76]. Taunton, “Australind,” London, 1903, p. 224.
[77]. “Tavernier’s Travels,” London, 1889, Vol. II, p. 115. See p. 97.
[78]. See “Report of the Royal Society,” Oct. 13, 1688.
[79]. Neither is there any special significance in the popular terms “clams,” “mussels,” etc., as applied to the pearl-bearing species of the rivers. The “clams,” or Unios of the Mississippi Valley, resemble neither the long clams (Mya) nor the round clams (Venus) of the Atlantic coast; the mussels of the fresh-water lakes are quite distinct from the edible ones of brackish waters, and the Pinna oyster and the giant clam (Tridacna) have little resemblance to the mollusks with which these terminal names are commonly associated.
[80]. Jameson, “On the identity and distribution of the mother-of-pearl oysters; with a revision of the subgenus Margaritifera.” Proceedings of the Zoölogical Society of London, Vol. L, 1901, pp. 372–394.