Cortinellidae is an extinct taxonomic family of fossil sea snails.

Siliquariidae is a family of sea snails with unusual, very loosely coiled shells.

In 1903 he started the study of the Pyramidellidae, a family of mostly small and minute ectoparasitic sea snails.

This family is not to be confused with the family of fossil sea snails with a similar name, Craspedostomatidae.

Retusidae is a family of very small sea snails, marine opisthobranch gastropod mollusks.

Turbinellidae are a family of sea snails, marine gastropod mollusks in the order Neogastropoda.

Pileolidae is an extinct family of fossil sea snails, marine gastropod mollusks.

This family of sea snails are found mainly in tropical seas, though some species also inhabit the waters of the polar circles.

She is an authority on the Muricidae, a large and diverse family of predatory sea snails, marine gastropod mollusks.

Lophospiridae is an extinct taxonomic family of sea snails, marine gastropod molluscs.