Other than cataclysm, asymmetrical attack, or government gone wild, we have little to worry about.
The larva is curiously asymmetrical, as many as fourteen gill-clefts appearing in an unpaired series on the right side, while the mouth is a large orifice on the left side, the anus being median.
A curious and interesting modification of the indirect method, known as " asymmetrical division," occurs frequently in epitheliomata, sarcomata, &c. (Hansemann).
If the nitrogen atom in the quaternary ammonium salts be in combination with four different groups, then the molecule is asymmetrical, and the salt can be resolved into optically active enantiamorphous isomerides.
Asymmetrical, inequivalve, fixed, with extensive pallial sutures; no siphons.