Abstract
THE use of optical projection in certain screw-gauges1 and pivot-wear meters2 suggested methods for examining the kind and degree of variation shown by plane spiral coiling in a group of small and well-preserved lamellibranchs (Gryphœa incurva (Sow.)) when researches upon these variations were extended3 in this Department recently. Identical methods proved applicable to the study of small ammonites and other shells, whether fossil or recent, provided they were coiled in a plane spiral.
Similar content being viewed by others
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
DOLLAR, A. Optical Projection as an Aid in Studying Plane Spiral Coiling of Small Fossil Lamellibranchs. Nature 150, 57–58 (1942). https://doi.org/10.1038/150057b0
Issue Date:
DOI: https://doi.org/10.1038/150057b0
- Springer Nature Limited
This article is cited by
-
Tracing Plane Spiral Coiling
Nature (1942)