Pages That Mention Holothrix orthoceras [Descriptions of orchid genera] [manuscript], 1880-1908. Manuscript 11IndexedPage 487523 [color illustration] [black and white illustrations] M. S. del. J.N.Fitch lith Vincent Brooks Day & Son Imp L Reeve & Co. London. Holothrix orthoceras Last edit about 4 years ago by alettnerDisplaying 1 page