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 - 103페이지 |
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22 페이지
... cerebral hemispheres were connected together , as in birds , only by the ' fornix ' and ' anterior commissure1 . ' Soon afterward , I had the opportunity of determining that the same deficiency of structure prevailed in the ...
... cerebral hemispheres were connected together , as in birds , only by the ' fornix ' and ' anterior commissure1 . ' Soon afterward , I had the opportunity of determining that the same deficiency of structure prevailed in the ...
23 페이지
... cerebral organ in this quest . 6 In 1842 , I was able to demonstrate , in the Hunterian Course of Lectures ' delivered at the Royal College of Sur- geons , the leading modifications of the mammalian brain , and their peculiar value in ...
... cerebral organ in this quest . 6 In 1842 , I was able to demonstrate , in the Hunterian Course of Lectures ' delivered at the Royal College of Sur- geons , the leading modifications of the mammalian brain , and their peculiar value in ...
24 페이지
... cerebral character , LYENCEPHALA ' , -signifying the comparatively loose or disconnected state of the cerebral hemispheres . The size of these hemispheres ( fig . 4 , A ) is so small that they leave exposed the olfactory gan- . glions ...
... cerebral character , LYENCEPHALA ' , -signifying the comparatively loose or disconnected state of the cerebral hemispheres . The size of these hemispheres ( fig . 4 , A ) is so small that they leave exposed the olfactory gan- . glions ...
25 페이지
... cerebral hemispheres overlap the olfac- tory lobes and cerebellum , but they extend in advance of the 1 λισσός , smooth ; ἐγκέφαλος , brain . 2 yupów , to wind about ; éyképaλos , brain . Fig . 8 . one and further back than the. Brain of ...
... cerebral hemispheres overlap the olfac- tory lobes and cerebellum , but they extend in advance of the 1 λισσός , smooth ; ἐγκέφαλος , brain . 2 yupów , to wind about ; éyképaλos , brain . Fig . 8 . one and further back than the. Brain of ...
26 페이지
... cerebral character ; according to my es- timate of which , I am led to regard the genus Homo as not merely a representa- tive of a distinct or- der , but of a distinct Brain of Negro , upper view . Fig . 9 . subclass , of the Mam- malia ...
... cerebral character ; according to my es- timate of which , I am led to regard the genus Homo as not merely a representa- tive of a distinct or- der , but of a distinct Brain of Negro , upper view . Fig . 9 . subclass , of the Mam- malia ...
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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 Linnæus LISSENCEPHALA lobes lower jaw lumbar LYENCEPHALA male mammæ 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 vertebræ young zoological Zootoka
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56 페이지 - ... 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 페이지 - 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 페이지 - 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 페이지 - 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 페이지 - 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 페이지 - 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 페이지 - 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 페이지 - 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 페이지 - ... 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.