156 S. J. /Smith on American Crustacea. 



Sesarma Say. 

 Sesarma reticulata Say. 



Ocypode (Sesarma) reticulatus Say, Journal Academy Nat. Sci., Philadelphia, vol. i, p. 

 7.3, 76, pi. 4, fig. 6, 1817, and p. 442, 1818. 



(Sesarma re^zcwZaiffi Gibbes, Proceedings American Association, 3d meeting, p. 180. 

 1850 ; Edwards, Annales des Sciences naturelles, S^ie serie, Zoologie, tome xx, 1853, 

 p. 182; Stimpson, Annals Lyceum Nat. Hist., New York, vol-, vii, p. 66, 1859. 



This species is found at New Haven, Conn., inhabiting salt-marshes 

 and associated with Gelasimus pugnax. 



In this species, the first segment of the male abdomen projects lat- 

 erally considerably beyond the second segment, and beyond tlie pos- 

 terior margin of the carapax, and tlie third segment is as wide as the 

 first and its lateral margins are strongly arcuate ; at the fourth seg- 

 ment, the abdomen is suddenly contracted and the remaining portion 

 is quite narrow and the margins are slightly concave to the sixth seg- 

 ment ; the terminal segment is scarcely more than one half as wide as, 

 but considerably longer than, the sixth, much longer than broad, and 

 its extremity rounded. The appendages of the first segment extend 

 nearly to the extremity of the sixth segment, are articulated at their 

 bases to a slender, arched plate, much as m Glyptograpsus impressus, 

 are triquetral, quite stout, nearly straight and widely separated even 

 to their tips, which are slightly flattened and hairy. The appenda- 

 ges of the second segment are short and slender and are lodged in 

 grooves at the bases of the appendages of the first segment. 



Sesarma sulcata, sp. nov. 



Female. The carapax is quadrihiteral in outline and much broader 

 than long. The dorsal surface is convex in both directions, but some- 

 what more so longitudinally than laterally, and is clothed anteriorly 

 and along the sides with scattered fascicles of short hairs. The pro- 

 togastric lobes ai'e divided, for half their length anteriorly, into nearly 

 equal lobules by well mai-ked sulci, and are limited next the orbits by 

 deep depressions which extend to the antero-lateral angle of the cara- 

 pax. The median portion of the gastric region is surrounded by a 



