This 1966 hardcover book titled "THE PLANKTON OF THE SEA" by R.S. Wimpenny was published in New York and printed in Great Britain.  See photos for the list of content and illustrations.  It is in good condition.  It was owned by my marine biologist uncle, Craig Barilotti,and it doesn't not have his name on it.  I couldn't find any writing/marking on the pages.  The top left corner of the fold-out page has some minor folds.  The inside covers have discoloration. When the book is closed the page edges show discoloration.  The hardcover is wrapped in a blue linen.  The spine has silver text on a black background square.  The cover is worn and has discoloration.  The fabric is very worn at the spine edges and has separated. See photos for conditions.