The Canadian Journal of Industry, Science and Art, Том 2,Выпуск 4;Том 4Canadian Institute., 1859 |
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Стр. 3
... pygidium . The latter , like that of A. platy- cephalus ( Isoletus gigas ) , is destitute of segment - markings except in faint traces on the surface below the crust , and the axis is but slightly pronounced . The body - axis , with ...
... pygidium . The latter , like that of A. platy- cephalus ( Isoletus gigas ) , is destitute of segment - markings except in faint traces on the surface below the crust , and the axis is but slightly pronounced . The body - axis , with ...
Стр. 4
... Pygidium furrowed . - A . Halli . Pygidium smooth . - A . platycephalus . pygidium The characters given above , and more especially those founded on the grooving of the pygidium and the direction of the pleuræ , may be thought by some ...
... Pygidium furrowed . - A . Halli . Pygidium smooth . - A . platycephalus . pygidium The characters given above , and more especially those founded on the grooving of the pygidium and the direction of the pleuræ , may be thought by some ...
Стр. 141
... pygidium , coupled with the presence of short narrow horns at the posterior angles of its head - shield . Apart from the horns , it much resembles in its general aspect the well known Asaphus platy- cephalus . The branches of the facial ...
... pygidium , coupled with the presence of short narrow horns at the posterior angles of its head - shield . Apart from the horns , it much resembles in its general aspect the well known Asaphus platy- cephalus . The branches of the facial ...
Стр. 142
... Pygidium smooth : A. platycephalus , Stokes . A. Hincksii , Chapman . Pygidium furrowed : A. Halli , Chapman . A. megistos , Locke . A. Canadensis , Chapman . The horned species of the genus Asaphus fall naturally into two groups : in ...
... Pygidium smooth : A. platycephalus , Stokes . A. Hincksii , Chapman . Pygidium furrowed : A. Halli , Chapman . A. megistos , Locke . A. Canadensis , Chapman . The horned species of the genus Asaphus fall naturally into two groups : in ...
Стр. 491
... Pygidium small , pointed , without visible rings , and having a narrow ridge running down the centre . The description is chiefly drawn from an impression in slate , and a cast made from the same , together with some fragments of the ...
... Pygidium small , pointed , without visible rings , and having a narrow ridge running down the centre . The description is chiefly drawn from an impression in slate , and a cast made from the same , together with some fragments of the ...
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