The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . EVOLUTION OF MAN. PLATE Fi^.2 S||^_ Fig. I. Siredon piscifortnis. Fig. 2. Salamandra maculata. TAILED BAtRACHtANS AND FHOG BATRACHIANS. 131 of Amphibia, the Frog Batrachians {BatracJda, or Anura),is 3^et more complete than in the Salamanders. To thesebelong all the various kinds of Toads, Water-fiogs, Tree-frogs, etc. In the course of transformation these lose notonly the gills, but also the tail, which drops off in somecases earlier, in others later. In this respect the variou
The evolution of man: a popular exposition of the principal points of human ontogeny and phylogene . EVOLUTION OF MAN. PLATE Fi^.2 S||^_ Fig. I. Siredon piscifortnis. Fig. 2. Salamandra maculata. TAILED BAtRACHtANS AND FHOG BATRACHIANS. 131 of Amphibia, the Frog Batrachians {BatracJda, or Anura),is 3^et more complete than in the Salamanders. To thesebelong all the various kinds of Toads, Water-fiogs, Tree-frogs, etc. In the course of transformation these lose notonly the gills, but also the tail, which drops off in somecases earlier, in others later. In this respect the variousspecies differ somewhat from one another. In most FrogBatrachians the larvae drop the tail very earl}^, and thetail-less frog-like form subsequently grows considerablylarger. Other species, on the contrary, as, for instance, thePseudesparadoxus of Brazil, as also an European Toad {Pelo-hatesfuscus) remain for a very long time in the fish form,and retain a lengthy tail till they have almost attainedtheir full size; hence, after their metamorphosis is com-pleted, they appear much smaller than before. The oppositeextreme is seen in some
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Keywords: ., bookcentury1800, booksubjectembryologyhu, booksubjecthumanbeings
