Fishes . Fig. 473 —Channa formosana Jordan & Evermann. Streams of Formosa. These fishes have no special organ for holding water on thegills, but the gill space may be partly closed by a to Dr. Giinther, these fishes are able to siu-vivedrought living in semi-fluid mud or lying in a torpid statebelow the hard-baked crusts of the bottom of a tank fromwhich every drop of water has disappeared. Respiration is. Fig. 474.—Snake-headed China-fish, Ojo/urep/w/us barca. India. (After Day.) probably entirely suspended during the state of torpidity, butwhilst the mud is still soft enou
Fishes . Fig. 473 —Channa formosana Jordan & Evermann. Streams of Formosa. These fishes have no special organ for holding water on thegills, but the gill space may be partly closed by a to Dr. Giinther, these fishes are able to siu-vivedrought living in semi-fluid mud or lying in a torpid statebelow the hard-baked crusts of the bottom of a tank fromwhich every drop of water has disappeared. Respiration is. Fig. 474.—Snake-headed China-fish, Ojo/urep/w/us barca. India. (After Day.) probably entirely suspended during the state of torpidity, butwhilst the mud is still soft enough to allow them to come to thesurface, they rise at intervals to take in a quantity of air, bymeans of which their blood is oxygenized. This habit has beenobserved in some species to continue also to the period of theyear in which the fish lives in normal water, and individualswhich are kept in a basin and prevented from coming to thesurface and renewing the air for respiratory purposes are suffo-cated. The particular manner in which the accessor}^ branchialcavity participates in respiratory functions is not known. Itis a simple cavity, without an accessory branchial organ, the 586 Labyrinthici and Holconoti opening of which is partly closed by a fold of the mucous mem-brane. Ophiccphaliis stnatiis is the most widely diffused species inChina, India, and the Philippines, living in grassy swamps andbiting at any bai
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