. Bulletin. Science; Natural history; Natural history. 154 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 75. Figure 1. Photostyliis pycnoptenis, adult female, mm SL, SIO 69-330, from the southeastern Pacific Ocean. (1969:398) gave this length as mm but listed mm in table 1. Grey (1958) recorded mm SL for USNM 148472, whereas Goodyear found it to be mm. I found SIO 65-611-8 to measure mm SL rather than mm as stated by Goodyear. RESULTS AND DISCUSSION Photostylus pycnopterus is unusual in having numerous small luminous organs mounted on short pedicels
. Bulletin. Science; Natural history; Natural history. 154 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 75. Figure 1. Photostyliis pycnoptenis, adult female, mm SL, SIO 69-330, from the southeastern Pacific Ocean. (1969:398) gave this length as mm but listed mm in table 1. Grey (1958) recorded mm SL for USNM 148472, whereas Goodyear found it to be mm. I found SIO 65-611-8 to measure mm SL rather than mm as stated by Goodyear. RESULTS AND DISCUSSION Photostylus pycnopterus is unusual in having numerous small luminous organs mounted on short pedicels that are scattered about the head and body and sparsely on the rays of all but the pec- toral fins. Most of the pedicels are flattened laterally and appear to be oriented so that the thin edge of the flattened surface is presented to the flow of water. Perhaps the term photophore is a misnomer in that the luminous organ at the tip of the pedicel is variable in structure and shape, and does not appear to have any focusing mech- anism such as found in "photophores" of other fishes, principally in the Myctophidae and Ster- noptychidae. Some appear to be only a dorso- ventrally flattened layer of reflective tissue, a por- tion often iridescent; most are ovoid or rounded, with a base of iridescent tissue topped by tissue that is whitish in preservative. Some of the ped- icels bearing these luminous organs are dark, and the pigment often continues to the organ and covers it, except for a window over the iridescent or whitish portion. Others of these organs are sur-. 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 Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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