STALK-EYED CRUSTACEA 295 



I. Cyclograpsus integer. 



Cyclograpsiis integer . . Milne Edwards. 

 Grapsus integer .... Latreille. 



Tlie carapace contracted anteriorly. There is no 

 well-marked gutter behind the external orbital hiatus. 

 The sides of the carapace are entire. The inferior floor 

 of the orbit is well formed, and is separated from the 

 external angle by a notch. Terminal joint of walking 

 legs slightly spiny. 



Range. — Florida, Brazil. 



Subfamily II. Plagusinae. 



Plagusince Kingsley. 



Plagusiince Miers, Dana. 



Carapace much depressed ; internal antennae longi- 

 tudinally plicated, lodged in notches in the front, are 

 visible on a dorsal view. 



I. Plagusia. 



Plagnsia . . Latreille, H. Milne Edwards, Miers, 



Kingsley, Desmarest. 

 Cancer . . . Fabricius, Herbst. 



Carapace depressed, and little, if at all, broader than 

 long, with the antero-lateral margins dentated, and 

 slightly divergent to the bases of the third pair of legs. 

 The front not deflexed, less than half the width of the 

 carapace, is deeply cleft by the antennulary fossae. The 

 orbits are deep, and their anterior hiatus is large and 

 open. The eye - peduncles are very short and robust. 

 The basal joint of external antennae is considerably 

 dilated, and is slightly produced at its anterior angles; 

 the antero-internal angle reaches the front, and the 



