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adult alimentary canal amongst animal aperture appear applied arch arms attached base become belong birds blood body bones branchial called canal carried cavity chamber characters closely common completely composed comprising condition consists constitute contained covered developed distinct divided division dorsal entirely existence external extremity eyes fact feet females fins fishes foot four front furnished gills head heart horny includes insects intestine known lateral legs length less limbs living lower males Mammals means membrane mouth nature occur organs pair period placed plates portion possess present produced pupa regarded remains represented rocks rudimentary segments separate shell short side simple single sometimes species structure surface tail teeth termed toes true tube upper usually ventral vertebral whilst whole wings young
Página 642 - Kalong — attaining a length of from four to five feet from the tip of one wing to that of the other. The Pteropida are especially characteristic of the Pacific Archipelago — Java, Sumatra, Borneo, &c.
Página 486 - 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.
Página 41 - ... 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.
Página 65 - 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.
Página 278 - ZOOLOGY. sesses a pair of antennae, a pair of mandibles, and two pairs of maxillae, the hinder pair of which are coalescent, and form the
Página 486 - ... 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...
Página 486 - ... 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...
Página 21 - The sub-kingdoms are, in turn, broken up into classes, classes into orders, orders into families, families into genera, and genera into species.
Página iii - NICHOLSON. A Manual of Zoology, for the use of Students. With a General Introduction on the Principles of Zoology. By HENRY ALLEYNE NICHOLSON, MD, D.Sc., FLS, FGS, Regius Professor of Natural History in the University of Aberdeen.
Página 537 - Burong mati," or dead birds, indicating that the Malay traders never saw them alive. The Paradiseidfe are a group of moderate-sized birds, allied in their structure and habits to crows, starlings, and to the Australian honeysuckers ; but they are characterised by extraordinary developments of plumage, which are unequalled in any other family of birds. In several species large tufts of delicate bright-coloured feathers spring from each side of the body beneath the wings, forming trains, or fans, or...