On the Classification and Geographical Distribution of the Mammalia: Being the Lecture on Sir Robert Reade's Foundation, Delivered Before the University of Cambridge in the Senate House, May 10, 1859. To which is Added an Appendix "On the Gorilla" and "On the Extinction and Transmutation of Species"John W. Parker and Son, 1859 - 103ÆäÀÌÁö |
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18 ÆäÀÌÁö
... tertiary periods , to regard 3 incisors , 1 canine , and 7 succeeding teeth , on each side of both jaws , as the type formula of diphyodont dentition . Three of the seven teeth may be ' premolars ' ( fig . 2 , p . 1-3 ) , and four may ...
... tertiary periods , to regard 3 incisors , 1 canine , and 7 succeeding teeth , on each side of both jaws , as the type formula of diphyodont dentition . Three of the seven teeth may be ' premolars ' ( fig . 2 , p . 1-3 ) , and four may ...
42 ÆäÀÌÁö
... tertiary periods : such later and less typical Mammalia do more effective work by virtue of their adaptively modified structures . The Ruminants , e . g . , more effectually digest and assimi- late grass , and form out of it a more ...
... tertiary periods : such later and less typical Mammalia do more effective work by virtue of their adaptively modified structures . The Ruminants , e . g . , more effectually digest and assimi- late grass , and form out of it a more ...
43 ÆäÀÌÁö
... ( tertiary ) zoological period , the fossil Camelida of Asia are of the genus Camelus , so those of America are of the genus Auchenia . This geographical restriction ruled prior to any evidence of man's existence . Paleontology has ...
... ( tertiary ) zoological period , the fossil Camelida of Asia are of the genus Camelus , so those of America are of the genus Auchenia . This geographical restriction ruled prior to any evidence of man's existence . Paleontology has ...
44 ÆäÀÌÁö
... tertiary species of Dicotyles existed in North as well as South America . But no true Sus has been found fossil in either division of the New World , nor has any Dicotyles been found fossil in the Old World of the geographer ...
... tertiary species of Dicotyles existed in North as well as South America . But no true Sus has been found fossil in either division of the New World , nor has any Dicotyles been found fossil in the Old World of the geographer ...
48 ÆäÀÌÁö
... tertiary times in Europe ; and that a Sem- nopitheque existed in miocene times in India . But all the fossil remains of Quadrumana in the Old World belong to the family Catarhina , which is still exclusively confined to that great ...
... tertiary times in Europe ; and that a Sem- nopitheque existed in miocene times in India . But all the fossil remains of Quadrumana in the Old World belong to the family Catarhina , which is still exclusively confined to that great ...
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affinity Africa Anatomy animal anthropoid apes Aristotle Artiodactyles bony brain Bruta called canines Carnivora cerebral Cetacea Cheiroptera chimpanzee class Mammalia compared cranial cranium Cuvier deciduous degree dental characters dentition digits distinct Dryopithecus edentulous elephant existence extinct foot fore fossil Front teeth Gaboon genera genus gibbons gorilla hair hallux hind Hippopotamus Homo hoofed human species humerus Hylobates incisors Insectivora length less Linn©¡us LISSENCEPHALA lobes lower jaw lumbar LYENCEPHALA male mamm©¡ Mammalia Mammalian class Mammals marsupial Marsupialia maxillary miocene modifications molars monkeys muscles muscular natural naturalists nearer negro occipital orangs and chimpanzees organs osteological panzee peculiar pelvis Perissodactyles Pithecus placenta plantigrade premaxillary premolars present proportion Quadrumana quadrupeds races regard relative ribs ridge Rodentia Ruminants shew siamang Simia skeleton skull Sloths smaller strata structure subclass tailless tertiary thumb tion toes tooth tree Troglodytes Troglodytes gorilla true molars trunk unguiculate Ungulata Ungulates upper vertebr©¡ young zoological Zootoka
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56 ÆäÀÌÁö - ... species has to maintain against the surrounding agencies that are ever tending to dissolve the vital bond and subjugate the living matter to the ordinary chemical and physical forces.
49 ÆäÀÌÁö - I have already argued, his psychological powers, in association with his extraordinarily developed brain, entitle the group which he represents to equivalent rank with the other primary divisions of the class Mammalia founded on cerebral characters. In this primary group Man forms but one genus, Homo, and that genus but one order, called BIMANA, on account of the opposable thumb being restricted to the upper pair of limbs. The...
26 ÆäÀÌÁö - The superficial grey matter of the cerebrum, through the number and depth of the convolutions, attains its maximum of extent in Man. Peculiar mental powers are associated with this highest form of brain, and their consequences wonderfully illustrate the value of the cerebral character...
60 ÆäÀÌÁö - Vertebrata, but the sum of the animal species at each successive geological period has been distinct and peculiar to such period. Not that the extinction of such forms or species was sudden or simultaneous: the evidences so interpreted have been but local Over the wider field of life at any given epoch, the change has been gradual ; and, as it would seem, obedient to some general, continuously operative, but as yet, ill-comprehended, law.
60 ÆäÀÌÁö - Organic remains, traced from their earliest known graves, are succeeded, one series by another, to the present period, and never re-appear when once lost sight of in the ascending search. As well might we expect a living Ichthyosaur in the Pacific, as a fossil whale in the Lias : the rule governs as strongly in the retrospect as the prospect. A nd not only as respects the Vertebrata, but the sum of the animal species at each successive geological period has been distinct and peculiar to such period.
17 ÆäÀÌÁö - Mammalia ; and the homologous teeth are determined, like other parts, by their relative position, by their connexions, and by their development. Those teeth which are implanted in the premaxillary bones, and in the corresponding part of the lower jaw, are called 'incisors,' whatever be their shape or size. The tooth in the maxillary bone, which is situated at or near to the suture with the premaxillary, is the
60 ÆäÀÌÁö - In regard to animal life, and its assigned work on this planet, there has, however, plainly been an ascent and progress in the main. " Although the Mammalia, in regard to the plenary development of the characteristic orders, belong to the Tertiary division of geological time, just as ' Echini are most common in the superior strata; Ammonites in those beneath, and Product!
41 ÆäÀÌÁö - The molars, nearly always six in number on each side of the upper and lower jaws, have their crown marked with two double crescents, the convexity of which is turned inwards in the upper and outwards in the lower teeth.
55 ÆäÀÌÁö - ... the degree of incongruity between the generic forms of the mammalia which then existed in Europe, and any that actually exist on the great natural continent of which Europe now forms part. It would seem, indeed, that the further we penetrate into time for the recovery of extinct mammalia, the further we must go into space to find their existing analogues.