Note 469 — Chapter IX · ON CONCRETIONS, SPICULES, AND SPICULAR SKELETONS
Reading edition
Cf. Gamble, Radiolaria (Lankester’s Treatise on Zoology), vol. I, p. 131, 1909. Cf. also papers by V. Häcker, in Jen. Zeitschr. XXXIX, p. 581, 1905, Z. f. wiss. Zool. LXXXIII, p. 336, 1905, Arch. f. Protistenkunde, IX, p. 139, 1907, etc.