| Key | Title |
| 122 | Key to the genera of Halosauridae occuring in Western Central Pacific. |
| 123 | Key to the species of spiny eels (Notacanthidae) occuring in Western Central Pacific. |
| 901 | Key to species of halosaurs (Halosauridae) occurring in the Western Central Atlantic. |
| 902 | Key to species of spiny eels (Notacanthidae) occurring in the Western Central Atlantic. |