A Manual of Zoology for the Use of Students with a General Introduction on the Principles of ZoologyWilliam Blackwood and Sons, 1871 - 673페이지 |
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자주 나오는 단어 및 구문
abdomen Actinozoa adult alimentary canal ambulacral amongst animal Annelides antennæ anus aperture appendages arch arms articulated attached birds bivalve body bones bony Brachiopoda branchiæ branchial calcareous called carapace cavity chamber characterised chitinous ciliated composed comprising consists contractile Crustacea Ctenophora developed distinct division dorsal external extremity feet females fins fishes foot Foraminifera furnished gemmation gills head horny Hydrozoa Insects integument intestine known labium larva larvæ legs limbs lobes locomotive lophophore males Mammals mandibles mantle maxillæ membrane Mollusca mouth muscular nervous system neural operculum organs ovum pair pharynx placed plates polypide polypites Polyzoa portion possess posterior present reproductive respiratory rudimentary Scolecida segments shell side Silurian single siphons siphuncle sometimes somites species spines stomach structure Sub-class sub-kingdom sub-order surface tail teeth tentacles termed thorax toes transverse tube upper usually valves ventral vertebral column Vertebrates vesicles whilst wings Zoantharia zoöids
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iii 페이지 - A Manual of Palaeontology, for the Use of Students. With a General Introduction on the Principles of Palaeontology.
448 페이지 - Ichthyosaurus to cut through the waves. May it not therefore be concluded (since, in addition to these circumstances, its respiration must have required frequent access of air), that it swam upon or near the surface, arching back its long neck like a swan, and occasionally darting it down at the fish which happened to float within its reach.
39 페이지 - ... progress of opinion on the Origin of Species. Until recently the great majority of naturalists believed that species were immutable productions. and had been separately created. This view has been ably maintained by many authors. Some few naturalists, on the other hand, have believed that species undergo modification, and that the existing forms of life are the descendants by true generation of pre-existing forms.
59 페이지 - the foraminiferous fauna of our own seas probably presents a greater range of variety than existed at any preceding period ; but there is no indication of any tendency to elevation towards a higher type.
374 페이지 - As regards the special senses, there is one peculiarity which deserves particular notice, and this is the conformation of the nasal sacs. The cavity of the nose is usually double, and is lined by an olfactory membrane, folded so as to form numerous plicae. Anteriorly, the water is admitted into the nasal sacs by a single or double nostril, usually by two apertures ; but posteriorly the nasal sacs are closed, and do not communicate with the pharynx by any aperture. The only exceptions to this statement...
447 페이지 - ... paddles ; that it was marine is almost equally so from the remains with which it is universally associated ; that it may have occasionally visited the shore, the resemblance of its extremities to those of the turtle may lead us to conjecture ; its...
517 페이지 - ... as is also that tooth in the lower jaw which, in opposing it, passes in front of its crown when the mouth is closed. The other teeth of the first set are the ' deciduous molars ; ' the teeth which displace and succeed them vertically are the ' premolars ; ' the more posterior teeth, which are not displaced by vertical successors, are the ' molars,
448 페이지 - ... darting it down at the fish which happened to float within its reach. It may, perhaps, have lurked in shoal water along the coast, concealed among the seaweed, and raising its nostrils to a level with the surface from a considerable depth, may have found a secure retreat from the assaults of dangerous enemies ; while the length and flexibility of its neck may have compensated for the want of strength in its jaws, and its incapacity for swift motion through the water, by the suddenness and agility...
20 페이지 - The sub-kingdoms are, in turn, broken up into classes, classes into orders, orders into families, families into genera, and genera into species.
615 페이지 - Bosantiquus, and a small aboriginal species, the Bos longifrons, believed by Owen to be " the source of the domesticated cattle of the Celtic races before the Roman invasion." Order VII. Hyracoidea. — This little order, represented at the present day by no more than the single genus Hyrax, is not known to have any fossil representatives. Order VIII. Proboscidea. — This order, including no other living forms than the Elephants, came into existence in the Miocene period, where it is represented...