Heckert sentence example

heckert
  • According to some writers (Leuckart) they are derived from undifferentiated blastomeres, other authorities (Thomas, Biehringer, Heckert) trace them to the parietal cells of the larva.
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  • In many cases it appears that only the brilliantly coloured tentacle is pecked off by the bird, and as the snail can easily regenerate a new one, this in turn becomes infected by a fresh branch of the sporocyst ramifying through the snail and thus a new supply of larvae is speedily provided (Heckert).
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  • Heckert, "Untersuchungen fiber die Entwicklung and Lebensgeschichte des Distomum macrostomum," Bibliotheca zoologica, Heft 4 (Cassel, 1889); J.
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