| Key | Title |
| 74 | Key to the lampreys (Petromyzontidae) of Canada. |
| 334 | Provisional Key to Great Lakes Petromyzontid Larvae. (Lampreys) |
| 335 | Provisional Key to Great Lakes Petromyzontid Larvae. (Lampreys) |
| 682 | Key to species of Lampetra occuring in China. |
| 1313 | Key to Adults of Petromyzontidae of Alaska. |
| 1314 | Key to Ammocoetes of Petromyzontidae of Alaska. |