...looked upon as the modified descendants of bygone organic forms. As AR Wallace has expressed it : " Every species has come into existence coincident both in space and time with a pre-existing and closely allied species." The breaking up of biological regions into distinct, separate areas may...

...the theory of Natural Selection was the famous work of Malthus. In 1855 Wallace sent home an Essay " On the Law which has regulated the Introduction of New Species," which, though it attracted little general attention, was warmly welcomed as a valuable contribution to the...

...occupied with excursions from Kuching, the capital, to various places on the Sarawak river. His essay " On the Law which has Regulated the Introduction of New Species " (which preceded the historic essay of 1858, from Ternate) was written at Santubong in February, 1855. In March,...

...Deszendenztheorie bezeichnet werden kann. WALLACE formuliert das von ihm festgestellte Gesetz folgendermaßen: „Every species has come into existence coincident both in space and time with a pre-existing closely allied species". Wie dachte er sich nun die „Verbindung" zwischen den Arten? Er spricht mehrmals...

...significance that closely allied forms tend to cluster in the same general region. As Wallace remarks, " Every species has come into existence coincident both in space and time with a preexisting and closely allied species." This is, of course, what we should expect if species were derived the...

...significance that closely allied forms tend to cluster in the same general region. As Wallace remarks, " Every species has come into existence coincident both in space and time with a preexisting and closely allied species." This is, of course, what we should expect if species were derived the...

...the theory of Natural Selection was the famous work of Malthus. In lSo-3 Wallace sent home an Essay " On the Law which has regulated the Introduction of New Species," which, though it attracted little general attention, was warmly welcomed as a valuable contribution to the...

...has come into existence twice." The conclusion which Wallace drew from these observations was that "Every species has come into existence coincident both in space and time with a pre-existing closely allied species." Thought out about 1845, written at Sarawak in 1855, and published in the same...

...species has come into existence twice. 10. The following law may he deduced from these facts : — Every species has come into existence coincident both in space and time with a pre-existing closely allied species. This law agrees with, explains and illustrates all the facts connected with...

...renewal of the forms of life in successive geological epochs, he has deduced the following law : — Every species has come into existence coincident both in space and time with a pre-existing closely allied species. The question is one of great importance, and deserving the careful investigation...