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Bats are known to possess, of receiving impressions from the impact of the air.

This family is known to be spread over all parts of the world; and doubtless very many species yet remain to be described.

Genus Vespertilio. (Linn.)

Twelve species of this extensive genus have been recognised as inhabiting this island, and perhaps more may yet be discovered. They are distinguished by having a simple muzzle; teeth, inc. 2—2/3—3; can. 1—1/1—1; false mol. variable/variable; mol. 3—3/3—3; ears

PIPISTRELLE.

PIPISTRELLE.

separate, scarcely larger than the head; and the tail enveloped in the membrane. The pretty little Pipistrelle (Vespertilio pipistrellus, Geoff.), one