An introduction to the study of seaweeds / by George Murray.

  • Murray, George (George Robert Milne), 1858-
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to the study of seaweeds / by George Murray. Source: Wellcome Collection.

    218/324 (page 184)
    has been observed only in the open ocean, far from land. In coastal waters they occur separately. The genus Pyrocystis (P. noctiluca and P.fusiformis), observed by Dr. John Murray during the Challenger Expedition, and subsequently by other naturalists, is FIG. 57.—a, b, c, d, Pyrocystia nocliluca; e, P.fusiformis highly magnified. After J. Murray.) a very puzzling one, and, owing to our insufficient knowledge of its life-history, very hard to place in a satisfactory systematic position. It is a tropical form, and to it was attributed the most brilliant dis- plays of luminosity of the sea during the Challenger Expedition. It bears a certain degree of resem-