Buu. U.S. B. F., 1917-18. TehyNaNeY JOSS 
Upper pair: Flat niggerhead, Quadrula coccinea (Conrad), from Fox River. (See Dp. 25.) 
At bottom: Wabash pig-toe, Quadrula ruhoinosa (1.ea), from Cedar Creek, Ind. (See p. 25.) 
