Bull. U. S. F. C. 1 897. (To face page 426.) 
Plate XIV, 
GROUPED PEARLS, CONSISTING OF SEVERAL ORIGINALLY DISTINCT PEARLS JOINED TOGETHER AT A 
LATER STAGE BY A CONNECTING DEPOSIT OF NACRE. 
In Group A are seen many thus united, in some cases up to a dozen in number (fig. 1 ), and at times several in a linear series (fig. 3 ). In Group B 
are shown groups of from two to five, a beautiful triple one in fig. 7 and another in fig, 13. In fig. 6 two are joined so as to produce the 
“turned" appearance illustrated in Plate XIII. 
