MUD SHRIMPS OF THE ATLANTIC COAST OF 

 NORTH AMERICA 



By WALDO L. SCHMITT 

 Curator, Division of Marine Invertebrates, U. S. National Museum 



(With Four Plates) 



Except for the comprehensive and invaluable papers of de Man/ 

 and the exceedingly useful, though less exhaustive, account of Bor- 

 radaile,^ there is for American workers no readily available taxonomic 

 information concerning the several species of Callianassa occurring on 

 the Atlantic coast of North America. To fill this need in part at least, 

 these brief notes and diagnostic key have been compiled. To render 

 them as complete as possible at this time, it has been found necessary 

 to describe three new species, together with a new variety of one of 

 them, and to propose a new name for a specimen that had been assigned 

 to an old, inadequately described species, which to this day has not been 

 certainly rediscovered : 



Page 



Callianassa (Callicltirus) islagrande 3, 5 



janiaicense 4, 9 



janiaicense var. louisianensis 4, 12 



rathbnnac 4, 15 



hartmeyeri, new name for 



Glypturns grandimanus Balss 4 



It is possible also to report a new record of occurrence in Jamaica 

 for Callianassa (Callichirus) longwentris, a species not heretofore 

 seen since the original types were described by A. Milne-Edwards 

 from Martinique. 



Moreover, in the light of the studies contributory to this paper, 

 Stimpson's genus Glypturns appears no longer tenable, and its unique 

 species therefore reverts to the genus Callianassa. 



^ A contribution to the knowledge of twenty-two species and three varieties 

 of the genus Callianassa Leach. Capita Zoologica, vol. 2, pt. 6, pp. 1-56, pis. 

 1-12, 1928. 



The Thalassinidae and Callianassidae collected by the Siboga-Expedition with 

 some remarks on the Laomediidae. Siboga-Exped. Monogr. 393", pp. 1-187, pis. 

 1-20, 1928. 



'^ On the classification of the Thalassinidea. Ann. Mag. Nat. Hist., ser. 7, 

 vol. 12, pp. S34-SSI, 1903- 



Smithsonian Miscellaneous Collections, Vol. 93, No. 2 



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