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Observations on the maturation stages of the parthenogenetic and sexual eggs ofHydatina senta


Book ID
112706283
Publisher
Springer-Verlag
Year
1909
Weight
49 KB
Volume
27
Category
Article
ISSN
0374-5155

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โœ Whitney, David Day ๐Ÿ“‚ Article ๐Ÿ“… 1909 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 629 KB

the eggs had hatched. Of the seven remaining eggs one was a winter egg, three were dead parthenogenetic eggs and the other three contained living embryos which were apparently unable to break through the egg envelope. March 14, at 8:qo p.m., twenty eggs were isolated and allowed to remain undisturb