Leptonia n. sp. Pileus up to 4 cm. diam, striate from incipient splitting over gills, translucent seeming somewhat transparent, disc clay color, margin pale pinkish buff to pinkish buff Gills pale pinkish buff to pinkish buff, distant, broad with small anastomosing gills between, adnate Stipe pinkish buff at top shading to tawny olive or Saccardo's umber at base, up to 4cm. x 3mm., cartilaginous, hollow, smooth, shining Costa Rica, Limon prov., Siam Farm, 20m. 7-30-36