A PRELIMINARY. LIST: OF THE UNIONIDA® OF 
WESTERN PENNSYLVANIA, WITH NEW 
LOGAELFITES FOR -SPECIES FROM 
EASTERN PENNSYLVANIA 
Dr. A. E. ORTMANN 
(Issued April £2, 1909.) 
{Reprinted from ANNALS OF THE CARNEGIE MusEUM, VOL. V, No. 2 and 3, 1909. ] 
