. Bulletin. Science; Natural history; Natural history. 1 12°00. MARINA MONTEREY 300 MUNICIPAL WHARF METERS Fig. 1. Configuration of Monterey Harbor in relation to the study area. Results and Discussion Sexual dimorphism and function of the ocular cirri.—Although Clark Hubbs (1953) presented six morphometric comparisons of the sexes of N. uninotatus that indicated dimorphism, I was unable to use these to determine the sex of specimens in nature. Jordan and Evermann (1896-1900), in their description of N. uninotatus (misidentified as N. blanchardi), pointed out that males had an ocular cirr
. Bulletin. Science; Natural history; Natural history. 1 12°00. MARINA MONTEREY 300 MUNICIPAL WHARF METERS Fig. 1. Configuration of Monterey Harbor in relation to the study area. Results and Discussion Sexual dimorphism and function of the ocular cirri.—Although Clark Hubbs (1953) presented six morphometric comparisons of the sexes of N. uninotatus that indicated dimorphism, I was unable to use these to determine the sex of specimens in nature. Jordan and Evermann (1896-1900), in their description of N. uninotatus (misidentified as N. blanchardi), pointed out that males had an ocular cirrus that was twice as long as the female's. Hubbs (1953) did not treat the ocular cirri in his account. However, his illustrations (Figs. 13 and 14) clearly indicate sexual differences in the ocular cirri development. I found the length and amount of branching in the primary ocular cirrus to be a reliable method of sexing individuals in nature. The male's primary ocular cirrus is not only longer but is also wider with more branching at the cirrus tip (Fig. 2). I devised a cirrus index (product of cirrus length and number of primary and secondary distal cirrus branches) as a measure. 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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