348 Amber, yellow, translucent, from Cretaceous marl, 



size, 2Y2, x 2*4, part of a mass that was 

 20 x 6 x 1 inch. Harrisonville, Gloucester 

 County, New Jersey. 



349 Amber, opaque brown, 1 x 1 x 1. Mantua 



Creek, Gloucester County, New Jersey. 



350 Amber, transparent brown, if x 1 x | inch. 



Cape Sable, Magothy River, Maryland. 



351 Amber, rounded grain. Laramie beds of the 



upper Cretaceous. Judith River, Montana. 



352 Amber, deep yellow, transparent, with green 



fluorescence like petroleum, 4)4 X2xi)( 

 inches. Southern Mexico. Quantities said 

 to exist in the interior, and to be used by 

 the Indians for making fires. 



PEARL-BEARING FRESH WATER MUSSELS. 



353 Anodonta ovata (Lea). Ohio to Michigan, Kansas 



and Louisiana. 



354 Margaritana rugosa, two (Barnes). Massachusetts 



to Ohio, Nebraska and Kansas. 



355 Margaritana complanata, two (Barnes). Ne- 



braska, Kansas, Western New York. 



356 Unio alatus, one (Say). New York to Minne- 



sota, Kansas to Louisiana. 



357 Unio undulatus (Barnes). Massachusetts, West- 



ern New York, Ohio River, Micnigan, 

 Kansas, Texas. 



358 Unio tuberculatus, two (Barnes). Texas, Kan- 



sas, Ohio to Northern Georgia, 



30 



