. Electro-physiology . FIG. 255.—a, from tail of Silurus glanis ; I, from the fourth i of Gymnotus. (Fritsch.) of Gymnotus corresponds throughout with that of the band of muscle just described in Malapterurus, which is here wanting, and has by its transformation given rise to the organ. There is no less certain proof that the so-called small organ of Gymnotus has been formed by the transformation of a part of the lower muscles of the fins. In correspondence with the very scanty development of the dorsal fin, two small triangular sections of muscles only are left in the cross-sections
. Electro-physiology . FIG. 255.—a, from tail of Silurus glanis ; I, from the fourth i of Gymnotus. (Fritsch.) of Gymnotus corresponds throughout with that of the band of muscle just described in Malapterurus, which is here wanting, and has by its transformation given rise to the organ. There is no less certain proof that the so-called small organ of Gymnotus has been formed by the transformation of a part of the lower muscles of the fins. In correspondence with the very scanty development of the dorsal fin, two small triangular sections of muscles only are left in the cross-sections of both Malap- terurus and Gymnotus, beneath the skin of the back (Fig. 255, a, b, mp). On the other hand, there are, on the ventral aspect of the cross-section, on both sides from the median plane, two
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
