jsorons of the Atlantic coast— riciiardson. 



559 



nuQierous depressions and prominences; the fourth segment is very 

 lonjs;'; the teriniiiiil j)ortions aiv broken in all th(^ spiM-lniens. The first 

 joint of the peduncle of the antennula is excavated on one side to 

 receive the curvature of the antennal peduncle; the other segments of 

 th(> pi^duncle are very small; the fiagellum is long and slend(>r, with a 

 great number of articles. 



Th(^ lirst seo-ment of the thorax is very narrow; nearly the whole 



Fig. 29.— Eurycoi'e cakibbea Benedict. 



surface is occupied by a transverse groove; on the median line and 

 posterior ridge is a prominent granule; the antero-lateral angles of 

 this segment are rounded. The second, third, and fourth segments 

 are also short and have deep transverse depressions which are much 

 narrower than the one in the first segment; on the median line of these 

 segments the space ])etween the groove or depression and the anterior 

 margin is occupied by the compressed base of a sharp spine which is 



