Conchyliologie fluviatile de la province de Nanking

159쪽

Planche XXXVI. 70. Ν0DON SUB-TETRAGONEA. Heilde. Testa solida, gibb080-iiislata, an lice altenuata, rotundata, postice dilatato-iriangulario margine Super Subrecto umbonibus pro eminentibus, ei OSulis, estexis, approXimali ; carina arguta, circum aream Sub- planani, OnSpicue bi-plicatam, obducta epidei male castaneo margarita albida. - Diam anter0-p0St. 68 m. int .marg. 37 in crass. 40 m.