. A guide to the study of fishes. Fishes; Zoology; Fishes. Fig. 304.—Channa formosana Jordan & Evermami. Streams of Formosa. These fishes have no special organ for holding water on the gills, but the gill space may be partly closed by a membrane. According to Dr. Gunther, these fishes are "able to survive drought living in semi-fluid mud or lying in a torpid state below the hard-baked crusts of the bottom of a tank from which every drop of water has disappeared. Respiration is. Fig. 305.—Snake-headed China-fish, Ophiceplialus barca. India. (After Day.) probably entirely suspended duri
. A guide to the study of fishes. Fishes; Zoology; Fishes. Fig. 304.—Channa formosana Jordan & Evermami. Streams of Formosa. These fishes have no special organ for holding water on the gills, but the gill space may be partly closed by a membrane. According to Dr. Gunther, these fishes are "able to survive drought living in semi-fluid mud or lying in a torpid state below the hard-baked crusts of the bottom of a tank from which every drop of water has disappeared. Respiration is. Fig. 305.—Snake-headed China-fish, Ophiceplialus barca. India. (After Day.) probably entirely suspended during the state of torpidity, but whilst the mud is stiU soft enough to allow them to come to the surface, they rise at intervals to take in a quantity of air, by means of which their blood is oxygenized. This habit has been observed in some species to continue also to the period of the year in which the fish Hves in normal water, and individuals which are kept in a basin and prevented from coming to the surface and renewing the air for respiratory purposes are suffo- cated. The particular manner in which the accessory branchial cavity participates in respiratory fimctions is not known. It is a simple cavity, without an accessory branchial organ, 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 Jordan, David Starr, 1851-1931. New York, H. Holt
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