Siliceous Shells of Protozoa

Abstract

WE regret that circumstances have prevented an earlier reply to Prof. T. D. A. Cockerell's letter published in NATURE of June 28. In our opinion, there can be no question of either convergent or divergent evolution in the case of organisms belonging to separate families as widely separated as Miliolina and Miliammina. We thought we had made their absence of relationship sufficiently clear by the statement that Miliammina was a siliceous isomorph of Miliolina, isomorphism being understood among rhizopodists, at any rate, to mean the development of similar structures in unrelated organisms owing to unknown physical or biological conditions.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

HERON-ALLEN, E., EARLAND, A. Siliceous Shells of Protozoa. Nature 126, 436 (1930). https://doi.org/10.1038/126436a0

Download citation

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.