General physiology; an outline of the science of life . erpart to these pheno-mena of the ingestion of sub-stance on the part of thenucleus. Here certain relationsexist toward the substancesproduced, which are whollyanalogous to those existing inova toward ingested the eggs of certain water-bugs, Nepa and Ranatra, thereoccur peculiar chitinous ap-pendages, the so-called egg-rays, which are formed by cellsespecially differentiated for thispurpose. These cells, of whicheach two unite into a singlecell with two nuclei, termedby Korschelt a double cell,assume a considerable size and
General physiology; an outline of the science of life . erpart to these pheno-mena of the ingestion of sub-stance on the part of thenucleus. Here certain relationsexist toward the substancesproduced, which are whollyanalogous to those existing inova toward ingested the eggs of certain water-bugs, Nepa and Ranatra, thereoccur peculiar chitinous ap-pendages, the so-called egg-rays, which are formed by cellsespecially differentiated for thispurpose. These cells, of whicheach two unite into a singlecell with two nuclei, termedby Korschelt a double cell,assume a considerable size and secrete within their body the mass of chitin. The behaviourof the two nuclei in this process is very characteristic (, 1). They send out toward the middle, where the secretion istaking place, numerous, frequently branched, pseudopodium-likeprocesses, which increase the nuclear surface upon this side veryconsiderably, while the rest of the surface remains smooth. Such en-largements of the surface of nuclei are wide-spread in the secreting- L L 2.
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Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
