...rotary, sculling motion, resembling that of a screw-propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...water through the gills, thus aiding respiration, wbich would otherwise be difficult on account of the narrowness and inflexibility of the branchial...

...sculling motion resembling that of a screw-propeller ; the caudal fin acts sis a rudder, save when it is needed for unusually rapid swimming, when it is used as by other fishes. The chief function of the broad pectorals appears to be that of fanning a current...

...rotary, sculling motion, resembling that of a screw propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...from the water, one of these fishes will live for 2or3 hours, all the time solemnly fanning its gills, and when restored to it« native element seems...

...rotary, sculling motion, resembling that of a screw propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...difficult on account of the narrowness and inflexibility o(' the branchial apertures. When taken from the water, one of these fishes will live for 2 or 3 hours,...

...rotary, sculling motion, resembling that of a screw propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...otherwise be difficult on account of the narrowness and iullexibilily of the branchial apertures. When taken from the water, one of these fishes will live...

...half-rotary, sculling motion, resembling that of a screw propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...gills, thus aiding respiration, which would otherwise he difficult on account of the narrowness and inflexibility of the branchial apertures. When taken...

...of forming a current of water through the gills, thus aiding respiration, which would otherwise l>e difficult on account of the narrowness and inflexibility...apertures. When taken from the water one of these lishes will live for two or three hours, all the time solemnly fanning it." gills, and when restored...

...half-rotary, sculling motion, resembling that of a screw profiler; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...gills, thus aiding respiration, which would otherwise l>e difficult on account of the narrowness and inflexibility of the branchial apertures. When taken...

...half-sculling motion, resembling that of a screw propeller; the caudal fin acts as a rudder, save when it is needed for unusually rapid swimming, when it...a current of water through the gills, thus aiding in respiration, which would otherwise be difficult on account of the narrowness and inflexibility of...

...half-rotary, sculling motion, resembling that of a screw propeller; the caudal tin acts as a rudder, save when it is needed for unusually rapid swimming, when it...as in other fishes; the chief function of the broad pectorale serins to he thai of forming a current of water through the gills, thus aiding respiration,...