Outlines of natural history for beginners |
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Página 16
... plates , which wall off the body - cavity into a series of chambers or compartments . The digested portions of the food pass through the stomach into the general cavity of the body , and the indigestible portions are got rid of through ...
... plates , which wall off the body - cavity into a series of chambers or compartments . The digested portions of the food pass through the stomach into the general cavity of the body , and the indigestible portions are got rid of through ...
Página 19
... plates ( fig . 7 , a a ) , which run across the groove , and are so shaped as to leave a little opening between every pair of plates in the series . It follows from the above , that if we cut the arm of the Star - fish across , we find ...
... plates ( fig . 7 , a a ) , which run across the groove , and are so shaped as to leave a little opening between every pair of plates in the series . It follows from the above , that if we cut the arm of the Star - fish across , we find ...
Página 29
... plate from the point where they join ( fig . 13 , 2 ) . In theory , also , each segment carries a pair of appen- dages , " which ought to be composed of two branches springing from a common base . În some cases , as in the tail ...
... plate from the point where they join ( fig . 13 , 2 ) . In theory , also , each segment carries a pair of appen- dages , " which ought to be composed of two branches springing from a common base . În some cases , as in the tail ...
Página 30
... Plate prolonged downwards from the line where the upper and lower arches unite ; a Base of the appendage ; b and c Outer and inner branches of the appendage . 3. One of the last pair of foot - jaws , carrying a gill ( g ) . Let us now ...
... Plate prolonged downwards from the line where the upper and lower arches unite ; a Base of the appendage ; b and c Outer and inner branches of the appendage . 3. One of the last pair of foot - jaws , carrying a gill ( g ) . Let us now ...
Página 36
... plate which covers the chest in front . A f Do 80 D m Fig . 15. - A , The male of the common House Spider ( Tegenaria civilis ) , con- siderably magnified ; c Front portion of the body , consisting of the amal- gamated head and thorax ...
... plate which covers the chest in front . A f Do 80 D m Fig . 15. - A , The male of the common House Spider ( Tegenaria civilis ) , con- siderably magnified ; c Front portion of the body , consisting of the amal- gamated head and thorax ...
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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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