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Quarterly Journal of Microscopical Science, Vol s3-99, 497-504, Copyright © 1958 by Company of Biologists

The Chromosome Numbers of certain Barnacles in British Waters

A. P. AUSTIN 1, D. J. CRISP 1, and A. M. PATIL 1

1 Marine Biology Station, Menai Bridge, Anglesey

The chromosome numbers of nine species of sessile barnacles have been determined from squashes of young embryos stained by an iron alum aceto-carmine method. All the species of Balanus examined, and Elminius modestus had a diploid count of 32 chromosomes. Chthamalus stellatus and Verruca stroemia had each 30 chromosomes. Meiosis occurs after the egg passes into the mantle cavity, and the cytological changes accompanying the extrusion of the two polar bodies are figured.






© The Company of Biologists Ltd 1958