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Among some polychaetes collected off the mouth of the Columbia River, Oregon, by Mr. Miles S. Alton, were 11 specimens of a species of Aphroditidae collected at a single deepwater station in 900 fathoms. The aphroditid is herein described as a new species belonging to a new genus.
I have taken this opportunity to review the genera in the family. Two genera,
Pontogenia Claparède and
Laetmonice Kinberg, have been emended and several others have been put into synonymy. In the diagnosis of the Aphroditidae and key to the genera, as herein revised, I have included neither
Triceratia Haswell, based on the indeterminable and perhaps incomplete
T. araeoceras Haswell, 1883, from Australia nor
Hermionopsis Seidler, based on the doubtful
H. levisetosa Seidler, 1923, from Kerguelen.