DULTCHTID^. 



29 



fore, that the only persistent character distinguishing the 

 Aberrantia from thp Normalia 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. 



