STALK-EVED CRUSTACEA 291 



Anterior part of carapace with folds. — {S. avieri- 

 cana.) 



I. Sesarma cinerea. 



Sesanna cinerea H. Milne Edwards, 



Say. 

 Sesarma reticulata \ 

 Grapsus 7rticulatus] 

 Grapsus cinereus Bosc, Latreille. 



Carapace square. Front deeply excavated in the 

 middle. There is no tooth on lateral border behind 

 external orbital tooth. 



Epistome covered with granulations. 



Range. — West Indies, Virginia, Florida, Soutli Caro- 

 lina, Berbice River. 



According to Stimpson, this species is broader than 

 long in the proportion of i to 1.09. 



2. Sesarma angustipes. 



Sesarma ayigtistipes . . Dana, Stimpson. 



Dimensions are : — Length, of male, 0.67 ; width, 

 anteriorly, 0.65 ; of female, length, 0.65 ; width, 0.75 inch. 

 The carapace is more convex and narrower than in 6". 

 cineria ; the width, measured between the orbital angles, 

 being less than the length. It is broader posteriorly. The 

 front is narrower, more projecting, and often sparsely 

 tuberculated. 



The walking legs are longer and more narrow than in 

 wS". cineria, to which this species has, in other respects, 

 much resemblance. 



Range. — West Indies, Florida, Brazil. 



