 It will be observed that all these authors consider the winter-ova or ephippial ova and the ordinary ova to be essentially identical, only that the former have an outer case. The truth is that they are essentially different structures. The true ova are...  The Cyclopædia of Anatomy and Physiology - Page 91by Robert Bentley Todd - 1859Full view - About this book
 | Microscopes - 1853 - 488 pages
...only that the former have an outer case. The truth is, that they are essentially different structures. The true ova are single cells which have undergone...become enveloped in a shell and simulate true ova. In a fully grown Lacinularia which has produced ova, the ovary, or a large portion of it, begins to... | |
 | William Benjamin Carpenter - 1854 - 802 pages
...ova ; for whilst the latter are single cells which have undergone a special development, the former are aggregations of cells, in fact larger or smaller portions (sometimes the whole) of the ovary, being probably gemma: which are evolved into zooids without fecundation, resembling the " ephippial... | |
 | Botany - 1861 - 562 pages
...only that the former have an outer case. The truth is that they are essentially different structures. The true ova are single cells which have undergone...become enveloped in a shell, and simulate true ova." This aggregation of several cells (one of them putting on the appearance and fulfilling the functions... | |
 | Andrew Pritchard - Desmidiaceae - 1861 - 1072 pages
...only that the former have an outer case. The truth is, that they are essentially different structures. The true ova are single cells which have undergone...become enveloped in a shell and simulate true ova. " In a fully-grown Lacinularia which has produced ova, the ovary or a large portion of it begins to... | |
 | Royal Society (Great Britain) - Electronic journals - 1862 - 668 pages
...only that the former have an outer case. The truth is that they are essentially different structures. The true ova are single cells which have undergone...become enveloped in a shell, and simulate true ova." This aggregation of several cells (one of them putting on the appearance and fulfilling the functions... | |
 | Richard Goldschmidt - Biology - 1912 - 852 pages
...only that the former have an outer case. The truth is that they are essentially different structures. The true ova are single cells, which have undergone...become enveloped in a shell, and simulate true ova." This aggregation of several cells (one of them putting on the appearance and performing the function... | |
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