. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 246 CALIFORNIA FISH AND CAME many are vacuolated. Extensive folding of the ovarian sheets greatly increases the area of the secretory epithelium. Also it was noted that the hypertrophied median fins of the embryos are folded up upon themselves and, or adjacent to, the fins of other embryos, rather than to the ovarian tissue (Figure 4), which one would expect if there were exchange between maternal and embryonic FICURE 11. Vie
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 246 CALIFORNIA FISH AND CAME many are vacuolated. Extensive folding of the ovarian sheets greatly increases the area of the secretory epithelium. Also it was noted that the hypertrophied median fins of the embryos are folded up upon themselves and, or adjacent to, the fins of other embryos, rather than to the ovarian tissue (Figure 4), which one would expect if there were exchange between maternal and embryonic FICURE 11. View of dense capillary bed found in dermal flap flanking dorsal fin H. caryi. Dark spots are red blood corpusceles, lighter areas connective tissue of dermal flap. Photo- graph by D. W. Behrens. The presence of an accessory respiratory device consisting of a tissue exten- sion protruding from the ovarian wall into the opercular opening of the embryo, as reported by Turner (1952) and Wiebe (1968) in Cymatogasteraggregata, and by Webb and Brett (1972) in Rhacochllus vacca, was sought in Hypsurus caryi and Embiotoca jacksoni but was never found. Measurements of Hypsurus caryi embryos showed a rapid yet temporary increase in the respiratory surface of their bodies. The fin elongates faster than the body until it reaches a peak of about 13 mm ( inch) when the embryo is about 48 mm ( inches) sl (Figure 12). At this stage, the dorsal fin appears greatly exaggerated in height. Measurements of the dorsal fins of 60 embryos showed that embryos 25 to 45 mm ( to inches) sl have a dorsal fin height nearly 25% their standard length, compared to in newborn fish. By the time the newborn reaches 62 mm ( inches) sl, the height of the dorsal fin in H. caryi hdiS been reduced to about 5 mm ( inch) and its proportional height is normal for free-living individuals. In the embryos of Embiotoca jacksorii, the final margin of the median fins is foretold as the embryo becomes pigm
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