Abstract
1. 1. In the fast (FBE) and most slow (SBE) bender excitor axons the spike was followed by a depolarizing afterpotential (DAP). The DAP reversal potential was about 25 mV above resting in FBE and 7 mV above resting in SBE. 2. 2. The resting potential and action potential amplitude were larger in FBE, while the input resistance was larger in SBE. 3. 3. In both axons, warming or addition of 200 mM ethanol to the saline decreased spike amplitude and increased DAP amplitude. 4. 4. In both axons there was a space between the axon membrane and the adaxonal glial cell.
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