Animal Parasites and MessmatesD. Appleton and Company, 1876 - 274 pagini |
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Pagina xix
... period of his exist- ence for the life of his victim . True parasites are very commonly found in nature , and we ... periods . They are not , as has been supposed , exceptional and strange beings , without any other organs than those of ...
... period of his exist- ence for the life of his victim . True parasites are very commonly found in nature , and we ... periods . They are not , as has been supposed , exceptional and strange beings , without any other organs than those of ...
Pagina xxi
... period they have had no thoughts of the cares of a family . It has always been somewhat difficult to establish the identity of those persons who frequent the public saloons one day , and are found on the next in the most obscure haunts ...
... period they have had no thoughts of the cares of a family . It has always been somewhat difficult to establish the identity of those persons who frequent the public saloons one day , and are found on the next in the most obscure haunts ...
Pagina xxii
... period nearer to our own times , our learned friend , Von Siebold , deservedly called the prince of hel- minthologists , was entirely of this opinion , and com- pared the cysticercus of the mouse with the tape - worm of the cat ...
... period nearer to our own times , our learned friend , Von Siebold , deservedly called the prince of hel- minthologists , was entirely of this opinion , and com- pared the cysticercus of the mouse with the tape - worm of the cat ...
Pagina 1
... period of their lives , and which provide for their own support at other times ; others are only messmates under certain given circumstances , and do not usually merit CHAPTER I ANIMAL MESSMATES Definition-Free Messmates-Fixed Messmates ...
... period of their lives , and which provide for their own support at other times ; others are only messmates under certain given circumstances , and do not usually merit CHAPTER I ANIMAL MESSMATES Definition-Free Messmates-Fixed Messmates ...
Pagina 14
... period when they are approaching the adult condition . Cuvier placed all the class of cirrhipedes among the mollusca , and the lernæans among the worms . Many of these animals which are but indif- ferently adapted to live without help ...
... period when they are approaching the adult condition . Cuvier placed all the class of cirrhipedes among the mollusca , and the lernæans among the worms . Many of these animals which are but indif- ferently adapted to live without help ...
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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