| Key | Title |
| 131 | Key to the genera of snake eels, worm eels (Ophichthidae) occuring in the Western Central Pacific. |
| 317 | Key to the species of Indo-Pacific Snake-eel (Genus Brachysomophis). |
| 907 | Key to species of snake eels (shrimp eels, worm eels, and sand eels) (Ophichthidae) occurring in the Western Central Atlantic. |
| 1540 | Key to the genera of Dalophis of West Africa. |
| 1585 | Key to the species of Dalophis of Lower Guinea,West-Central Africa. |
| 1586 | Key to the genera of Ophichthidae of Lower Guinea, West-Central Africa. |