Outlines of natural history for beginners |
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Página 64
... teeth . The breathing - organs are in the form of lamellar or plate- like gills , disposed on the sides of the body . These characters distinguish the class of the Lamellibranchiata as a whole . CHAPTER XVII . CLASS GASTEROPODA . IN ...
... teeth . The breathing - organs are in the form of lamellar or plate- like gills , disposed on the sides of the body . These characters distinguish the class of the Lamellibranchiata as a whole . CHAPTER XVII . CLASS GASTEROPODA . IN ...
Página 80
Henry Alleyne Nicholson. head , and is armed with small teeth , which have a uniform size , and are bent backwards . The throat is pierced with a series of slits , which , as we shall see , allow the water to reach the gills or breathing ...
Henry Alleyne Nicholson. head , and is armed with small teeth , which have a uniform size , and are bent backwards . The throat is pierced with a series of slits , which , as we shall see , allow the water to reach the gills or breathing ...
Página 85
... teeth attached to the upper jaw ; but the lower jaw is toothless . The tongue is fleshy , and instead of being rooted behind , it is fixed to the front of the mouth , so that its point is directed down the throat . The animal can ...
... teeth attached to the upper jaw ; but the lower jaw is toothless . The tongue is fleshy , and instead of being rooted behind , it is fixed to the front of the mouth , so that its point is directed down the throat . The animal can ...
Página 90
... teeth upon the palate . and owing both to this circumstance and to its mobility , the snake can open its mouth to an extraordinary width , and swallow morsels of comparatively immense size . Along the palate above , on each side , is ...
... teeth upon the palate . and owing both to this circumstance and to its mobility , the snake can open its mouth to an extraordinary width , and swallow morsels of comparatively immense size . Along the palate above , on each side , is ...
Página 92
... teeth permitting neither division of the food nor masti- cation . It is a sluggish animal , which remains torpid during the winter , and is most active and most poisonous in the hottest weather . RECAPITULATION OF ESSENTIAL CHARACTERS ...
... teeth permitting neither division of the food nor masti- cation . It is a sluggish animal , which remains torpid during the winter , and is most active and most poisonous in the hottest weather . RECAPITULATION OF ESSENTIAL CHARACTERS ...
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Palavras e frases frequentes
abdomen adductor muscle Advanced Text-Books animal antennæ appendages arms attached backbone beak bivalve blood body body-cavity bone breathing-organs breathing-tubes carries cavity chambers characters distinguish colour common common Frog common House Spider composed consists contained Crown 8vo Diagram Dictionary digestive distinct heart distinct vent distinguish the class domestic Goose dorsal fin Edition Engravings eyes Fcap feelers fins fluid Flustra foot-jaws Frog front Geology gills Goose Greek Grey Lag gullet head horny Hydra insect internal anatomy intestine jointed known Latin Leech limbs Lithobius Lithobius forficatus little nervous masses Lobster lower surface lungs mantle MANUAL means membranous mouth muscular Mya arenaria nervous system opens outer pairs of legs peculiar Perch PHYSICAL GEOGRAPHY plate portion processes quadrate bone RECAPITULATION OF ESSENTIAL rings or segments rudimentary Scolecida shell side skin skull soft spines Star-fish stomach sub-kingdom sucker tail teeth tentacles thorax tion tube valve Whelk Zoology
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