. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 66 J. H. WELSH AND F. A. CHACE, JR. found far below 180 meters during the day; hence it must be subjected to a very low intensity of illumination. Systellaspis dchilis has much the same vertical distribution as A. pnrpurca, but this form possesses numerous photophores, and, as has already been pointed out, there is an apparent correlation between the size of the eye and the presence or absence of photophores, for species 2 * li * I. X OB/oaAori/jar/ma/a/t _7 r • Acanf/>e/ody'ra ourourto + riumertff aera q/octo/rj JO IS of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 66 J. H. WELSH AND F. A. CHACE, JR. found far below 180 meters during the day; hence it must be subjected to a very low intensity of illumination. Systellaspis dchilis has much the same vertical distribution as A. pnrpurca, but this form possesses numerous photophores, and, as has already been pointed out, there is an apparent correlation between the size of the eye and the presence or absence of photophores, for species 2 * li * I. X OB/oaAori/jar/ma/a/t _7 r • Acanf/>e/ody'ra ourourto + riumertff aera q/octo/rj JO IS of Loroaacf in 20 Fir,. 7. The diameters of the eyes of four series of acanthcphyrids are here shown plotted against carapace length. Oplophonis and Systellaspis have photo- phores. of Systellaspis and Oplophorus have larger eyes in proportion to body size than the other genera of acanthephyrids which lack photophores. The ability to emit clouds of luminous material is possessed by certain of the deep-sea prawns, as has been mentioned by Alcock (1902) and by Beebe, who observed this phenomenon frequently in his bathy- sphere descents. So little is known of this interesting method of il- luminating the surroundings that it is not possible to hazard a guess as to its effect on the development of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
