...swimbladder into a lung, or organ used exclusively for respiration. On this view it may be inferred that all vertebrate animals having true lungs have...prototype, of which we know nothing, furnished with a floating apparatus or swimbladder. We can thus, as I infer from Professor Owen's interesting description...

...described our common prototype in a way to suggest the idea of the great sea-serpent. ' It may be inferred that all vertebrate animals having true lungs have...prototype, of which we know nothing, furnished with a floating apparatus or swim-bladder ' (210) ; this coupled with 'the There was therefore no violation...

...Natural Selection has actually converted a swim-bladder into a lung. On this view it may be ' inferred that all vertebrate animals having true lungs have...prototype, OF WHICH WE KNOW NOTHING, furnished with a floating apparatus or swim-bladder ' (210). The proof drawn from an ' ideal similarity ' leading to...

...asserted original rudiment becomes an insuperable difficulty. * I can hardly doubt,' says Mr. Darwin, ' that all vertebrate animals having true lungs have...prototype, of which we know nothing, furnished with a floating apparatus or swim-bladder. But the transmutation of a mere air-bladder, which contracts and...

...asserted original rudiment becomes an insuperable difficulty. ' I can hardly doubt,' says Mr. Darwin, ' that all vertebrate animals having true lungs have...from an ancient prototype, of which we know nothing, famished with a floating apparatus or swim-bladder. But the transmutation of a mere air-bladder, which...

...agreement which subsists between the teachings of revelation and of science, Mr. Darwin says, " I can hardly doubt that all vertebrate animals having true...from an ancient prototype of which we know nothing." If his theory had been true, we should have found in the debris of past eras, the remains of animals...

...can hardly doubt that all vertebrate animals having two lungs have descended by ordinarygeneration from an ancient prototype of which we know nothing^ furnished with a floating apparatus or swim-bladder. So all lungs were once swim-bladders, and betray a fishy ancestry....

...selection has actually converted a swim.bladder into a lung, or organ used exclusively for respiration.' ' I can indeed hardly doubt that all vertebrate animals...true lungs have descended by ordinary generation from the ancient prototype, of which we know nothing, furnished with a floating apparatus or swimbladdcr.'...

...converted a swim -bladder into a lung, or organ used exclusively for respiration.' I / can indeed hardfy doubt that all vertebrate animals having true lungs have descended by ordinary generation from the ancient prototype, of which we know nothing, furnished with a floating ap|«iratus or swimbladder.'...

...doubt, that the theory of descent with modification embraces all the members of the same class." " I can indeed hardly doubt that all vertebrate animals having true lungs are descended by ordinary generation from an ancient prototype, of which we knoio nothing, furnished...