| Ref. No. | Title |
|---|---|
| 134318 | The electric motor nerve centers in the skates (Rajidae). |
| 134319 | Embryonic history of the electric apparatus in Gymnarchus niloticus. |
| 134320 | The habits of Astroscopus and the development of its electric organs. |
| 134321 | A remarkable polarity in the motor nerve cells of the electric apparatus of Tetronarce occidentalis. |