. Bulletin. Science; Natural history; Natural history. 184 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES E o c CO c Q u - 0-20 mm O 8 - 20-40 mm • 40-60 mm A o 60-80 mm A 6 - o -r 4 - 2 - iL 1 ^— o 0 - 1 0 k 1990 1991 1992 1993 / Year \ 40 20 0 0 40 80 120 Size class (mm length) n=121 40 80 120. 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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Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience