An Electron Microscope Study of the Cells Lining the Small Blood Vessels of Helix pomatia Linn

From the Department of Zoology, University of Western Ontario, London, Ontario, Canada, and the Department of Zoology, The Queen's University of Belfast, Belfast, Northern Ireland).

From the Department of Zoology, University of Western Ontario, London, Ontario, Canada, and the Department of Zoology, The Queen's University of Belfast, Belfast, Northern Ireland).