in the Museum of the S^nithsonian Institution. 129 



never before been published, and I believe it to be identical 

 with J^alaemonetes of Heller, recently- described from a species 

 found in the fresh water lakes of Southern Europe. If it should 

 prove distinct, the name Palaemonopsis may be retained for it. 



Palaeiiionetes vulgaris. 



Palaemon mlgaris Say, Journal of the Academy of Natural Sciences of 

 PhHadelphia, I, 248. 



This species is very common in the brackish waters of the 

 inlets along our coast, from Massachusetts to South Carolina. 

 I have distributed specimens to European Museums under the 

 name Palaemo7iopsis vulgaris. 



Palaeiiionetes carolinu§, nov. sp. 



Kostrum of moderate breadth, rather long, reaching a little beyond 

 the extremity of the antennal scale, and curved upward considerably. 

 It is ciliated and serrated above throughout to the tip, with nine 

 teeth ; the posterior tooth being a little further removed from the 

 second than the second is from the third, and situated at the anterior 

 third of the carapax ; the third tooth is directly above the base of the 

 eye-peduncles. The extremity of the rostrvim is acute, or sometimes 

 minutely bifid. Beneath, the rostrum is armed with four teeth, and 

 densely ciliated. Antennas of both pairs as in P, vulgaris. Feet of 

 the second pair long, reaching much beyond the extremity of the ros- 

 trum; extremity of carpus jvist falling short of the end of the anten- 

 nal scale ; hand much stouter than in P. vulgaris ' fingers a little 

 shorter than the palm. The feet of the first pair reach scarcely be- 

 yond the extremity of the carpus of the second pair. 



Of the same size, and nearly allied to P. vulgaris, but easily 

 distinguished by its recurved rostrum, and larger feet of the 

 second pair. It has been distributed to other museums under 

 the name Palaemonopsis carolinus. 



It was originally found in the harbor of Charleston, S. C, 

 by Col. J. D. Kurtz and myself, and has since been found in 



