STALK-EYED CRUSTACEA 257 



abdomen almost entirely covering the seventh joint of the 

 sternum, a portion of which, however, is exposed on each 

 side at the lateral sinuses of the abdomen, which occur 

 between its second and third joint. None of the 

 abdominal segments are soldered together. 



Range. — East Coast of subtropical and tropical 

 America. 



I. Euryplax nitidus. 



Euryplax nitidus .... Stimpson. 



Carapace smooth and shining, convex from before 

 backwards. Proportion of length to breadth as i to 1.65. 

 Antero-lateral margins less than half as long as the 

 postero-lateral, and armed with three strong teeth, includ- 

 ing the angle of the orbit. Postero-lateral margin some- 

 what concave. Front deeply notched on each side at 

 the insertion of the antennae ; the interantennal margin 

 straight and smooth, with no median emargination. First 

 pair of legs robust, smooth and glossy above ; fourth joint 

 excavated at summit, with a sharp tooth just behind the 

 excavation ; fifth joint flattened above, and unidentate 

 within ; superior margin of hand almost acute ; fingers 

 somewhat deflexed. Inner side of fifth joint, and surface 

 of fourth around the circular pit, densely pilose. Walking 

 legs slender, those of the third pair longest. 



Range. — St. Thomas, Florida, New Orleans. 



2. Speocarcinus. 



SpeocarciuHs .... Stimpson. 



Carapace convex from before backwards, almost flat 

 from side to side. Front of moderate width. Facial 



