— lineatus, xlii, 95.f
— oculus-iridis, xlii, 95.
— patina, xlii, 96.f
— radiatus, xlii, 95.f
Craspedodiscus, genus, xlviii, 324.f
Denticella polymera, xlviii, 328.f
Desmidium aculeatum, xli, 289.f
— hexaceros, xli, 289.f
— Schwartzii, xli, 288.f
Diatomæ, American, J. W. Bailey, xxxv, 118.f