DULICHTID®. 29 
fore, that the only persistent character distinguishing the 
ABERRANTIA from the NorMatia is the absence of one or 
more segments from the tail. We are justified, conse- 
quently, in associating this family with the Aberrant 
rather than with the Normal group of Amphipoda, 
amongst which it has been previously arranged. 
As yet, but a single genus is known belonging to this 
family. 
The Vignette below represents a sketch taken by Dr. 
Walker of a jetty at New Brighton on the Mersey, off 
the mouth of which he took some animals of this genus, 




