164 EXPLORATION OF BURTON MOUND [BTH. ANN. 44 
THIcK CLAMSHELL Disk BEADS 
Thick disks of white clamshell may be enumerated as follows. 
Examples are shown in Plate 26, 6, c. 
Blank for thick disk bead, 13 mm. diameter, 12.5 mm. thick. 
Thick disk bead, 9.5 mm. diameter, 2.5 mm. thick. Hole 2 mm. diameter. 
Thick disk bead, 12 mm. diameter, 4.25 mm. thick. Hole 1.5 mm. diameter. 
Blank for thick disk bead, 12 mm. diameter, 7 mm. thick. Unbored. 
Thick dise bead, 8.5 mm. diameter, 3 mm. thick. Hole 2 mm. diameter. 
Thick disk bead, 9 mm. diameter, 5 mm. thick. Hole 2 mm. diameter. 
Thick disk bead, 13 mm. diameter, 4 mm. thick. Hole 2.5 mm. diameter. 
Thick disk bead, 9.5 mm. diameter, 6 mm. thick. Hole 1.5 mm. diameter. 
Thick disk bead, 12 mm. diameter, 8 mm. thick. Hole 2 mm. diameter. 
Thick disk bead, 9.5 mm. diameter, 4 mm. thick. Hole 2 mm. diameter. 
Blank for thick disk bead, 11.5 mm. diameter, 7 mm. thick. Unbored. 
Blank for thick disk bead, 11 mm. diameter, 6 mm. thick. Hole 2 mm. 
diameter. ' 
Thick disk bead, 6 mm. diameter, 6.5 mm. thick. Hole 3 mm. diameter. 
Blank for thick dise bead, 14 mm. diameter, 11 mm. thick. Unbored. 
Blank for thick disk bead, 10 mm. diameter, 9 mm. thick. Unbored. 
Blank for thick disk bead, 12 mm. diameter, 8.5 mm. thick. Unbored. 
QGtopuLaR Braps or CLAMSHELL 
A few globular beads of white clamshell were found. They have 
the shape of globular glass beads. An average specimen measures 6 
mm. diameter. Hole 1 mm. diameter. An example is shown in 
Plate 26, f. 
SMALL CYLINDRICAL BEADS OF CLAMSHELL 
The average measurements of these white cylinders of clamshell 
are 4 mm. diameter, 4 mm. long, hole 1 mm. diameter. Examples 
are shown in Plate 26, g. 
SQUARE BEADS OF ABALONE 
Square plates cut from abalone shell, about 6 mm. diameter and 
with a hole at the center about 2 mm. diameter, were infrequently 
met with. An example is shown in Plate 26, e. 
TRIANGULAR BEADS OF CLAMSHELL 
A plate cut from clamshell and forming a neat triangle in outline 
was found. It is the only bead of its kind and has a maximum 
diameter of 10 mm. with a hole 2 mm. diameter at the center. (PI. 
26, d.) 
ABALONE BLIsTER PEARL BEAD 
The most valuable bead of the collection is one made from a large 
blister pearl taken from an abalone. The pearl has taken on the 
shape of an elongated spheroid and is quite symmetrical. The bead 
