The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life and The Descent of Man and Selection in Relation to SexModern library, 1936 - 1000 páginas |
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Página 167
... common goose . In this latter bird , the lamellæ of the upper mandible are much coarser than in the common duck , almost confluent , about 27 in number on each side , and terminating upwards in teeth - like knobs . The palate is also ...
... common goose . In this latter bird , the lamellæ of the upper mandible are much coarser than in the common duck , almost confluent , about 27 in number on each side , and terminating upwards in teeth - like knobs . The palate is also ...
Página 319
... common . But the three genera on the left hand have , on this same principle , much in common , and form a sub - fam- ily , distinct from that containing the next two genera on the right hand , which diverged from a common parent at the ...
... common . But the three genera on the left hand have , on this same principle , much in common , and form a sub - fam- ily , distinct from that containing the next two genera on the right hand , which diverged from a common parent at the ...
Página 828
... common ; about five years ago he shot one , and after- wards another , and now they are frequently killed . " The spike - horn dif- fers greatly from the common antler of the C. virginianus . It consists of FIG . 64. Strepsiceros Kudu ...
... common ; about five years ago he shot one , and after- wards another , and now they are frequently killed . " The spike - horn dif- fers greatly from the common antler of the C. virginianus . It consists of FIG . 64. Strepsiceros Kudu ...
Contenido
INTRODUCTION | 3 |
VARIATION UNDER DOMESTICATION | 15 |
CHAPTER II | 38 |
Derechos de autor | |
Otras 23 secciones no mostradas
Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1936 |
Términos y frases comunes
acquired adult allied apes appear Argus pheasant beak beautiful become believe birds breeds cause characters closely colour common confined crossed crustaceans degree descended developed distinct species domestic doubt eggs existing extinct extremely fact favourable feathers female fertility fishes formation forms Fritz Müller genera genus gradations greater number groups habits horns hybrids important individuals inhabitants inherited insects instance instincts intermediate islands kind larvæ latter Lepidoptera less likewise living Malay Archipelago males mammæ mammals manner Marsupials modified monkeys natural selection naturalists nearly nest observed occur ocelli offspring organs Origin of Species ornaments perfect period pigeons plants plumage pollen possess present probably produced progenitor quadrupeds races relation remarks resemble rudimentary seeds sexes sexual selection shew shewn slight South America sterility stridulating structure supposed tail tion transmitted variability variations varieties various vary whilst whole widely wings young Zoolog