_a._ Spines of _Viznaga_ cactus (_Echinocactus_ _wislizeni_) (139547),
which have been straightened. _b._ Bone flaker (139556), over-all
length, 12 cm.; wood, 11.2 cm. long; bone, 3.4 cm. long. _c._ Bone
flaker (139557), over-all length, 13.1 cm.; wood, 11.5 cm. long; bone,
5.6 cm. long. _d._ Cord-wrapped stick (139558c), 17.3 cm. long. _e._
Cord-wrapped stick (139558b), 15.8 cm. long. _f._ Cord-wrapped cane
(139558d), 10.3 cm. and 5.4 cm. long. _g._ Cord-wrapped hide (139548).