Stebbing — Mamaia and Mamaiidas. 159 



a tiuligciiusof Pisa, hut this subgenus was never described, simply 

 because investigation showed that there was no such sul)genus. 

 It was not the name only that was dropped, but the thing. 

 That which de Haan eventually described was a subgenus, not 

 of Pisa, hut oi Ma ja. It must be considered fortunate that he 

 did not choose to name it 7*rtraina?/a, for, had he done so, we 

 should have been saddled with a generic name and several 

 others consequent upon it all signifying a relationship to Maja, 

 when carcinolog}^ no longer possessed a Maja to which they 

 could be either nearlyor distantly related. Under these circum- 

 stances I trust that Mamaia and Mamaiidas will be allowed to 

 stand . 



