Note 481 — Chapter IX · ON CONCRETIONS, SPICULES, AND SPICULAR SKELETONS (continued 2)
Reading edition
Leidy, J., Fresh-water Rhizopods of N. America, 1879, p. 262, pl. xli, figs. 11, 12.
Reading edition
Leidy, J., Fresh-water Rhizopods of N. America, 1879, p. 262, pl. xli, figs. 11, 12.