Abstract:
The length ratios of the upper tooth row were compared within individual genera of European bats. The results obtained resemble those given by Tamsitt (1967) for bats living in tropical stable environments. It follows that this index is not useful in comparisons of bats with respect to the severity of their competition for food, assuming that in the tropical stable environments this competition is more severe than in the temperate climate. The severity of food competition is the result of too many factors to be measured by this method.