PAPERS OX GEOGRAPHY AND GEOLOGY 329 



MUSSEL SHELLS PROBABLY OBTAINED MAINLY FBOM THE 



MISSISSIPPI RIVER 



EUiptio dilatatus (Raf.) Spike or Lady-finger. Com- 

 mon. A fine specimen of this shell, which had been made 

 into a nose or ear ornament, was found at a depth of 20 

 feet in the James Barney Mound. The purple nacre of 

 the interior was beautifully preserved. 



Proptera alata megaptera Eaf. Pink Heel-splitter. 

 An effigy representing- a human head was found in the 

 Sawmill Mound ( a burial structure ) made from a piece 

 of this shell. A gorget or ornament of peculiar design 

 made from this species was found in burial mounds 19, 

 20, 21 (overlapping mounds). This species was not 

 common. 



Megalonaias gigantea i Barnes) Washboard. A me- 

 dium sized specimen from the James Ramey Mound had 

 been made into a shell hoe. Very rare. Fragments be- 

 lieved to be of this species were found mixed with deer 

 bones. 



Amblema costata Raf. Three-ridge. Found in all 

 mounds, common. One specimen from James Ramey 

 Mound made into a hoe, 



Amblema peruviana (Lam.) Blue-point. Rare. 



Quadrula quadrula Raf. Maple-leaf. Common. 



Quadrula cylindrcia (Say.) Rabbit 's-foot. Rare. 



Cyclouaias tube re id at a (Raf.) A specimen (broken) 

 from mounds 19, 20. 21, had been used as a hoe. Rare, 



TrunciUa truncata Raf. Deer-toe. Rare. Found at 

 depth of 21 feet in James Ramey Mound near the bottom 

 of the structure. 



LampsUis fallaciosa (Smith) Simpson. Slough Sand 

 Shell. Rare.' 



LampsUis anondontoides (Lea). Yellow Sand Shell. 

 Not common. 



LampsUis siliquoidea (Barnes). Fat Mucket. Xot com- 

 mon. 



LampsUis ovata (Say). Pocket-book Mussel. Rare. 

 A specimen from the cemetery at Pittsburg Lake, south 

 of the Cahokia group, had been used as an ornament, sev- 

 eral holes being drilled in the side. 



