STALK-EYED CRUSTACEA 285 



Range. — Bermuda, St. Vincent, West Indies, Florida, 

 Brazil, Nicaragua, California, Tahiti, New Zealand, 

 Australia, Madeira. 



2. Pachygrapsus gracilis. 



Pacl/jgrapsns gracilis . Stimpson, Saussure, Kingsley. 



MctopograpsJis gracilis . Saussure. 



Grapsus giiadidpcnsis . Desbonne and Schramm. 



Grapsus {Leptograpsus) 



regulosus .... Von Martens. 



The carapace has no folds on the cardiac region ; 

 lateral margins nearly straight, one toothed. Frontal 

 lobes nearly obsolete ; front nearly horizontal, regularly 

 bowed, and minutely crenulate. The hand and fingers 

 are spined above. The posterior distal angle of the fourth 

 joint of last pair of legs dentate. 



Ranc;e. — ^West Indies, Florida. 



6. Nautilograpsus. 



Nantilograpsus . H. Milne Edwards, Kingsley, Miers. 



Places .... Leach, Bowdich, Bell. 



Carapace subquadrate, with the postero-lateral margins 

 somewhat convergent, dorsally smooth, slightly convex, 

 and usually with a slightly indicated lateral postorbital 

 tooth. The front is broad, about half the width of the 

 carapace ; its anterior margin projecting slightly, nearly 

 straight. The orbits are small, and the margins entire, 

 or with only a very small notch beneath the eye-peduncles 

 near the external orbital tooth. The eye-peduncles are 

 short and thick. The basal joint of external antenna; is 

 short, robust, and is produced at its antero-external angle, 

 which forms a lobe or tooth, and lies within the interior 

 hiatus of the orbit ; the flagellum is short. 



The epistoma is short, broadly transverse. The 



