The plates and species descriptions are, for the most part, first class.

Notes on American fresh water shells, with descriptions of two new species.

Empty shells were used as the basis for the species description.

Their catch provided the type specimens for the species description.

Miller's work included the descriptions of seven new species from North America.

But almost 25 percent of new species descriptions were made from specimens that were more than 50 years old.

In total the flora included descriptions of 8125 species.

Those studies, while describing variations in organisms, may have contained descriptions of at least two species, she said.

This latter work contained descriptions of 517 species, many for the first time, based on examining over 1100 specimens.

Some species descriptions may only be regional characteristics, and may need further revision.