Animal Parasites and MessmatesD. Appleton and Company, 1876 - 274 pagini |
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Pagina xix
... exist- ence for the life of his victim . True parasites are very commonly found in nature , and we should be wrong were we to consider that they all live a sad and monotonous life . Some among them are so active and vigilant that they ...
... exist- ence for the life of his victim . True parasites are very commonly found in nature , and we should be wrong were we to consider that they all live a sad and monotonous life . Some among them are so active and vigilant that they ...
Pagina xxiii
... exist without the assistance of others , pro- ducing boys and girls able to provide for themselves . The mother is parasitical and viviparous , her daughters are , during their whole life , free and oviparous . This observation leads us ...
... exist without the assistance of others , pro- ducing boys and girls able to provide for themselves . The mother is parasitical and viviparous , her daughters are , during their whole life , free and oviparous . This observation leads us ...
Pagina 5
... exist under very advan- tageous conditions in this respect , since we see Fier- asfers , which are themselves tolerable gluttons , accom- panied by Palæmons and Pinnotheres in the same animal . Professor C. Semper has seen holothuriæ in ...
... exist under very advan- tageous conditions in this respect , since we see Fier- asfers , which are themselves tolerable gluttons , accom- panied by Palæmons and Pinnotheres in the same animal . Professor C. Semper has seen holothuriæ in ...
Pagina 39
... exist parasites which only depend on others during their youth , so there are messmates which are completely independent when fully grown . Jacobson , of Copenhagen , wrote , in or about 1830 , a memoir to show that the young bivalves ...
... exist parasites which only depend on others during their youth , so there are messmates which are completely independent when fully grown . Jacobson , of Copenhagen , wrote , in or about 1830 , a memoir to show that the young bivalves ...
Pagina 56
... exist at the expense of their own females . It is almost useless to make the remark that more especially here there exist almost insensible gradations of difference between parasites , messmates , and free animals , and we shall find ...
... exist at the expense of their own females . It is almost useless to make the remark that more especially here there exist almost insensible gradations of difference between parasites , messmates , and free animals , and we shall find ...
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Termeni și expresii frecvente
abdomen abode acaridæ acarus amphipod animal annelids appearance Ascaris attacks become birds blood body Bothriocephalus Caligi carapace cavity cercaria cercariæ cestode cetacea ciliated cirrhipedes coast colour completely crab creatures crustaceans curious cysticerci cysticercus damp earth decapod distome echinoderm eggs embryos enclosed encysted female fish fleas gasteropod genus gives lodging harbours hatched hermaphrodite hooks host hymenoptera ichneumons infested inhabit insects intestines introduced isopod kind known larva larvæ leeches Leuckart live male manner messmates microscopic midst molluscs Mons mother mouth Müller natural naturalists neighbour nematode nourishment observed organs pagurus pass peculiar peritoneum pinnotheres plants polyps present prey produce Prof Professor Semper progeny remarkable resemble scolex seek sexes sexual sheep shell shelter side skin sometimes species sponge stomach Strongylus sucker tænia tæniæ Tania tape-worm trematode trichinæ usually whale worms young
Pasaje populare
Pagina iv - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance