invertebrate

The invertebrate fauna of the British deposits is, as might be expected, very poor until the beds of the Rhtic series are reached.

The invertebrate fauna shows an approximation to that of the present day.

This is particularly observable between the vertebrate and invertebrate animals.

Valentine began, startled out of his invertebrate placidity by a sensationalist more original than himself.

The eldest wrote from his dictation part of the sixth and seventh volumes of his work on the invertebrate animals.