PORTUNIDJE. 159 



FAMILY II. LEUCOSIAD^. 



Ebalia (Leach). Carapace lozenge-form, with 

 rounded angles ; front elevated. 



E. Pennantii. Fig. 301 ; n. s. 

 Bryerii. 

 Cranchii. 



FAMILY III. GRAPSID^E, 



Planes (Leach). Carapace rather longer than 

 broad, nearly square, with the sides rounded, 

 convex ; front broad, thin and bent downwards. 





P. Linnseana. Fig. 302 ; n. s. 



FAMILY IV. GONOPLACID^E. 



Gonoplax (Leach). Carapace four-sided, much 

 broader than long, narrowed behind; front the 

 whole width of carapace. 



G. angulata. Fig. 303 ; 1 n. s. 



FAMILY V. PINNOTHERID^. 



Pinnotheres (Latr.). Carapace nearly circular, 

 covering the inner antennae ; mouth-cavity half- 

 moon-shaped. (Minute crabs parasitic within the 

 shells of living bivalve mollusca.) 



P. pisum. Fig. 304 ; n. s, 

 veterum. 



FAMILY VI. PORTUNID^. 



Polybius (Leach). Carapace nearly circular, 

 slightly narrowed behind : all the feet much flat- 

 tened ; last joint of fifth pair very large, oval, and 



