Cyrillia linearis is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

They are transversally sharply striated with 6-7 elevated lines, which run along the volutions.

The siphonal canal is short, rather broad and slightly inflected.

[2] This marine species occurs in European waters from Norway to the Azores; in the Mediterranean Sea.

Fossils were found in Pliocene strata in Italy.