There are also several Albanian settlements in European Turkey and Asia Minor, some founded by military colonists who received grants of land from successive sultans, others owing their origin to enforced migrations after insurrections in Albania.
The migrations must have always been dependent upon physical difficulties, such as waterless tracts or mountain barriers.
Others again, like Michaelis and Rosenmiiller, have supposed that the name Cush was applied to tracts of country both in Arabia and in Africa, but the defective condition of the ancient knowledge of countries and peoples, as also the probability of early migrations of "Cushite" tribes (carrying with them their name), will account for the main facts.
As described for the polyp, they are wandering cells capable of extensive migrations before reaching the particular spot at which they ripen.
This mattel- is bound up with the centres of origin and with the past migrations of species; and such questions are usually treated as a part of floristic plant geography.