Outlines of natural history for beginners |
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Página 13
... skin , but they wound the soft bodies of the worms and other minute animals which upon the Hydra feeds , and they appear also to exercise some poisonous or benumbing effect . cell of the Hy- dra ; much magnified . In the summer time ...
... skin , but they wound the soft bodies of the worms and other minute animals which upon the Hydra feeds , and they appear also to exercise some poisonous or benumbing effect . cell of the Hy- dra ; much magnified . In the summer time ...
Página 16
... skin contains a vast number of microscopic stinging organs or " nettle - cells , " essentially similar to those which we have already seen in the Fresh - water Polype . The skin , also , is very contractile , and the animal can pull ...
... skin contains a vast number of microscopic stinging organs or " nettle - cells , " essentially similar to those which we have already seen in the Fresh - water Polype . The skin , also , is very contractile , and the animal can pull ...
Página 17
... skin in these animals is generally rendered prickly , like that of a hedge- hog , with numerous spines , tubercles , and grains of lime ( Greek , echinos , a hedgehog ; derma , skin ) . As an exam- ple of this class we may take the ...
... skin in these animals is generally rendered prickly , like that of a hedge- hog , with numerous spines , tubercles , and grains of lime ( Greek , echinos , a hedgehog ; derma , skin ) . As an exam- ple of this class we may take the ...
Página 18
... skin , from which project nume- rous blunt conical spines or prickles composed of lime . Along the middle of the back of each arm , these spines form a well - marked zigzag line , more conspicuous in some examples than in others ...
... skin , from which project nume- rous blunt conical spines or prickles composed of lime . Along the middle of the back of each arm , these spines form a well - marked zigzag line , more conspicuous in some examples than in others ...
Página 20
... skin of the back , the delicate membrane which lines the interior of the animal being protruded for this purpose in the form of small tubes which project through interspaces in the integument . The common Star - fish usually measures ...
... skin of the back , the delicate membrane which lines the interior of the animal being protruded for this purpose in the form of small tubes which project through interspaces in the integument . The common Star - fish usually measures ...
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anatomy animal appendages arms arrangement attached backbone base blood body bone breathing breathing-organs called carries chambers CHAPTER characters close colour common composed consists contained covered Crown 8vo derive developed digestive distinct distinguish Edition Engravings entire ESSENTIAL examine exhibits eyes fact fins fluid four front GEOGRAPHY Geology gills Greek head heart hinder HISTORY horny insect internal intestine jaws jointed kind known Latin leading legs less living Lobster lower MANUAL masses matter means membranous minute mouth muscles Natural nervous system numerous opens organs outer pair passes Physical placed plate portion possess present processes protected representative rings schools segments shell showing side single skin skull soft stomach structure sub-kingdom surface surrounded tail teeth termed terminates TEXT-BOOK tube turned upper valve vent volume whole young
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