General Zoölogy: Practical, Systematic and Comparative; Being a Revision and Rearrangement of Orton's Comparative ZoölogyAmerican book Company, 1903 - Всего страниц: 512 |
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Стр. 23
... layer of mud in ponds and slowly flowing streams ; in damp moss from sphagnum swamps ; in the deposit on the sides of water barrels in greenhouses ; in aquaria which have been standing for some time and which contain no crusta- ceans ...
... layer of mud in ponds and slowly flowing streams ; in damp moss from sphagnum swamps ; in the deposit on the sides of water barrels in greenhouses ; in aquaria which have been standing for some time and which contain no crusta- ceans ...
Стр. 32
... layers of cells ; the central cavity with one exterior opening ; the color of the inner cell layer and its cause ; the structure of the tentacles , the groups of nettle cells ; cause the discharge of the latter by run- ning a drop of ...
... layers of cells ; the central cavity with one exterior opening ; the color of the inner cell layer and its cause ; the structure of the tentacles , the groups of nettle cells ; cause the discharge of the latter by run- ning a drop of ...
Стр. 57
... layers , the outer being quite clear and transparent , while the inner is usu- ally filled with granules and ingested particles . During movement the shape of the body is constantly changing , owing to the protrusion and withdrawal of ...
... layers , the outer being quite clear and transparent , while the inner is usu- ally filled with granules and ingested particles . During movement the shape of the body is constantly changing , owing to the protrusion and withdrawal of ...
Стр. 58
... layers or cavity ; its pseudopodia are long and threadlike , and may unite where they touch each other . It has the property of secreting an envelope , usually of carbonate of lime . The shell thus formed is sometimes of extraor- dinary ...
... layers or cavity ; its pseudopodia are long and threadlike , and may unite where they touch each other . It has the property of secreting an envelope , usually of carbonate of lime . The shell thus formed is sometimes of extraor- dinary ...
Стр. 65
... the " flesh . " The sur- DODGE'S GEN . ZOÖL . - 5 FIG . 13. - Diagram of a simple sponge : i , inhalant opening ; o , exhalant opening or oscu- lum . face of the body is covered by a single layer PORIFERA 65 Porifera.
... the " flesh . " The sur- DODGE'S GEN . ZOÖL . - 5 FIG . 13. - Diagram of a simple sponge : i , inhalant opening ; o , exhalant opening or oscu- lum . face of the body is covered by a single layer PORIFERA 65 Porifera.
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General Zoölogy: Practical, Systematic and Comparative; Being a Revision and ... James Orton,Charles Wright Dodge Недоступно для просмотра - 2018 |
Часто встречающиеся слова и выражения
abdomen alimentary canal allantois amphibians antennæ apparatus artery auricle birds blood vessels body cavity bones brain branch calcareous called capillaries carnivorous cells cerebellum cerebrum cilia CLASS color consists coral cord corpuscles covered Crustacea cuttlefish digestive DODGE'S GEN dorsal eggs embryo epidermis esophagus eyes fibers fishes fluid forms frog ganglia gills glands gullet head heart higher animals hind horny insects intestine invertebrates jaws lacteals larvæ latter layer legs limbs living lobes lobster locomotion lower lungs magnified mammals mandibles maxillæ membrane Metazoa microscopic minute mollusks mouth muscles muscular nerve nervous system notochord opening Order organs pair plants plates polyps protoplasm Protozoa quadrupeds reptiles resemble respiration sea urchin segments shell side skeleton skin skull snail species spinal spines sponge starfish stomach structure substance surface tail teeth tentacles thorax tion tissue toes tongue tube upper usually valves ventricle vertebral column vertebrates whale wings worms
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Стр. 436 - There is no exception to the rule that every organic being naturally increases at so high a rate that, if not destroyed, the earth would soon be covered by the progeny of a single pair.
Стр. 450 - Beagle,' as naturalist, I was much struck with certain facts in the distribution of the organic beings inhabiting South America, and in the geological relations of the present to the past inhabitants of that continent.
Стр. 436 - The condor lays a couple of eggs and the ostrich a score, and yet in the same country the condor may be the more numerous of the two ; the Fulmar petrel lays but one egg, yet it is believed to be the most numerous bird in the world.
Стр. 14 - ... be taken off, we find a great mass of flesh, or what is technically called muscle, being the substance which by its power of contraction enables the animal to move. These muscles move the hard...
Стр. 438 - The air is swarming with insects — those little animated miracles. The waters are peopled with innumerable forms, from the animalcule, so small that one hundred and fifty millions of them would not weigh a grain, to the whale, so large that it seems an island as it sleeps upon the waves. The bed of the seas is alive with polypes, crabs, star-fishes, and with sand-numerous shell-animalcules.
Стр. 466 - All the foregoing rules and aids and difficulties in classification are explained, if I do not greatly deceive myself, on the view that the natural system is founded on descent with modification; that the characters which naturalists consider as showing true affinity between any two or more species, are those which have been inherited from a common parent...
Стр. 407 - It has not been sufficiently insisted on, that in the various branches of Social Science there is an advance from the general to the special, from the simple to the complex, analogous with that which is found in the series of the sciences, from Mathematics to Biology. To the laws of quantity comprised in Mathematics and...
Стр. 469 - They are no more the producers of vital phenomena than the shells scattered in orderly lines along the sea-beach are the instruments by which the gravitation - force of the moon acts upon the ocean. Like these, the cells mark only where the vital tides have been and how they have acted.
Стр. 399 - Gibbon-apes has the remarkable power of emitting a complete octave of musical notes. The human voice, taking the male and female together, has a range of nearly four octaves. Man's power of speech, or the utterance of articulate sounds, is due to his intellectual development rather than to any structural difference between him and the Apes. Song is produced by the glottis, speech by the mouth.
Стр. 274 - ... modified in accordance with the habits of the creature. They are, therefore, of great zoological value ; for, such is the harmony between them and their uses, the naturalist can predict the food and general structure of an animal from a sight of the teeth alone. For the same reason, they form important guides in the classification of animals; while their durability renders them available to the paleontologist in the determination of the nature and affinities of extinct species, of which they...