Chap. TX. 



Crustaceans. 



269 



weapons well adapted for fighting. Thus when a Devil-crab 

 (Portvnus puber) was seen by a son of Mr. Bate fighting with a 

 Carcinus mcenas, the latter was soon thrown on its back, and had 

 every limb torn from its body. When several males of a Brazilian 

 Gelasimris, a species furnished with immense pincers, were 

 placed together in a glass vessel by Fi'itz Miiller, they mutilated 

 and killed one another. Mr. Bate put a large male Carcinus 





Fig. 8. Orchcstia Darwinli (from Fritz Miiller), shnwing the difFerently-constnicted 

 ch lie of the two male forms. 



moenas into a pan of water, inhabited by a female which was 

 na.ired with a smaller male ; but the latter was soon dispossessed. 



