03 Barnacle Introduction
The base of the shell attached to the substrate is membranous in some species, but others have a white calcareous disk that often remains on the substrate after the barnacle has died and been swept away (as in this image).
Full INTRODUCTION TEXT at flic.kr/p/dLXuCY
Albums with full accounts of all British acorn barnacle species at www.flickr.com/photos/56388191@N08/collections/7215763361...
03 Barnacle Introduction
The base of the shell attached to the substrate is membranous in some species, but others have a white calcareous disk that often remains on the substrate after the barnacle has died and been swept away (as in this image).
Full INTRODUCTION TEXT at flic.kr/p/dLXuCY
Albums with full accounts of all British acorn barnacle species at www.flickr.com/photos/56388191@N08/collections/7215763361...