...which would invade the open district. "Given any species in any region, the nearest related species is not likely to be found in the same region nor in a remote region, but in a neighbouring district separated from the first by a barrier of some sort. "Doubtless wide fluctuations...

...the following words are used: " Given any species, in any region, the nearest related species is not to be found in the same region nor in a remote region,...the breadth of which gives the effect of a barrier." Substituting the word "kind" for species in the above sentence, thus including geographical subspecies,...

...and Jordan's (1905, 547) statement that "given any species in any region, the nearest related species is not likely to be found in the same region nor in...separated from the first by a barrier of some sort." Steere (1894, 419) evidently had the the same point in mind when he formulated the law "the genus is...

...law of germinate species is: "Given any species, in an}' region, the nearest related species is not to be found in the same region, nor in a remote region,...separated from the first by a barrier of some sort, or by a belt of country the breadth of which gives the effect of a barrier." Cunningham, who attempted...

...occasional exceptions, given any form of animal or plant in any region, the nearest related form is not to be found in the same region nor in a remote region, but in a neighboring region, separated from the first by a barrier of some sort, not freely traversable. A law, that is,...

...follows : — " Given any species (or kind) in any region, the nearest related species (or kind) is not to be found in the same region, nor in a remote region,...the breadth of which gives the effect of a barrier." This law holds good as a general rule among animals. The only exceptions yet indicated are found among...

...smaller number of genera or families. . . . Given any species in any region, the nearest related species is not likely to be found in the same region nor in...separated from the first by a barrier of some sort " (248). The fauna of islands show in a striking manner the effects of isolation. Some of these islands,...

...evolution in the species considered. "Given any species in any region, the nearest related species is not likely to be found in the same region nor in...separated from the first by a barrier of some sort. ' ' President Jordan has subsequently stated that " barrier" is here used in a very broad sense. This...

...as follows: Given any species (or kind) in any region, the nearest related species (or kind) is not to be found in the same region nor in a remote region,...the breadth of which gives the effect of a barrier." Jordan adds (pp. 73, 74): This law holds good as a general rule among animals. The only exceptions...

...as follows: Given any species (or kind) in any region, the nearest related species (or kind) is not to be found in the same region nor in a remote region,...the breadth of which gives the effect of a barrier." Jordan adds (pp. 73, 74): This law holds good as a general rule among animals. The only exceptions...