...best adapted to obtain a regular supply of food, and to defend themselves against the attacks of thcir enemies and the vicissitudes of the seasons, must...and, in extreme cases, become altogether extinct. Between these extremes the species will present various degrees of capacity for ensuring the means...

...dependent upon its more or less perfect Adaptation to the Conditions of Existence. It seems evident that what takes place among the individuals of a species...least capable of counteracting the vicissitudes of food-supply, &c., must diminish in numbers, and, in extreme cases, become altogether extinct. Between...

...among the individuals of a species must also occur among the several allied species of a group,—viz., that those which are best adapted to obtain a regular...least capable of counteracting the vicissitudes of food-supply, &c., must dimmish in numbers, and, in extreme cases, become altogether extinct. Between...

...dependent upon its more or less perfect Adaptation to the Conditions of Existence It seems evident that what takes place among the individuals of a species...those species which, from some defect of power or organisation, are the least capable of counteracting the vicissitudes of food-supply, etc., must diminish...

...among the individuals of a species must also occur among the several allied species of a group,—viz., that those which are best adapted to obtain a regular...those species which, from some defect of power or organisation, are the least capable of counteracting the vicissitudes of food-supply, etc., must diminish...

...health and vigor-pthose who are best able to obtain food regularly, and avoid their niflrierous enemies. It is, as we commenced by remarking, 'a struggle for...of counteracting the vicissitudes of food supply, etc., must diminish in numbers, and, in extreme cases, become altogether extinct. Between these extremes...

...and vigour — those who are best able to obtain food regularly, and avoid their numerous enemies. It is, as we commenced by remarking, " a struggle...and, in extreme cases, become altogether extinct. Between these extremes the species will present various degrees of capacity for ensuring the means...

...species must also occur among the several allied species of a group, — viz. that those which are the best adapted to obtain a regular supply of food, and...and, in extreme cases, become altogether extinct. Between these extremes the species will present various degrees of capacity for ensuring the means...

...and vigour — those who are best able to obtain food regularly, and avoid their numerous enemies. It is, as we commenced by remarking, "a struggle for...and, in extreme cases, become altogether extinct. Between these extremes the species will present various degrees of capacity for ensuring the means...

...and vigour — those who are best able to obtain food regularly, and avoid their numerous enemies. It is, as we commenced by remarking, "a struggle for...and, in extreme cases, become altogether extinct. Between these extremes the species will present various degrees of capacity for ensuring the means...