None. [Introduction] "The upper layers of mud in tidal basins such as sloughs and lagoons of various parts of the world are often abundantly populated by minute worms of widely related annelids, for example, Streblospio benedicti Webster of the family Spionidae, Capitella capitata (Fabricius) of the family Capitellidae, and several species of Sabellidae, subfamily Fabricinae, discussed below. Estuarine worms of this kind may occur in prodigious numbers over considerable areas. Since they are usually very small (a few millimeters long), inconspicuously colored , and covered with slime and debris, they are easily overlooked. Because of their abundance and slime-secreting properties they may be a factor of considerable importance in preventing soil transport.
The Fabricinae are known from the Pacific from comparatively few, mostly isolated, records. The present study concerns some unreported populations from California. In addition, other species of the subfamily from the Pacific are reviewed, and affinities of some others indicated . Monroika, a new name, is proposed for Manayunkia africana Monro, 1939. There are new combinations in the genera Fabricia, Oridia, and Manayunkia . Fabricia limnicola is newly described."
