MCERA. 



349 



This genus was founded by Dr. Leach to receive 

 Montagu's Cancer (Gammarus) grossimanus ; but it was 

 ignored by Milne Edwards and most authors, until Dana 

 reinstated it ; unfortunately, however (no doubt from 

 Leach's inadequate description), he attributed the cha- 

 racter of this genus to Leach's type of Melita, and on the 

 other hand described his genus Melita not in accordance 

 with the typical species. 



The vignette represents young naturalists in deep 

 research. 



