VOL. XIV, PP. 179-180 SEPTEMBER 25, 1901 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SUBTERRANEAN CRUSTACEANS FROM 

 THE UNITED STATES. 



BY W. P. HAY. 



During a recent visit to the Mammoth Cave of Kentucky, 

 and Nickajack Cave in Tennessee, the writer was fortunate 

 enough to obtain from the former twelve specimens of a small 

 eyeless shrimp, and from the latter about as many specimens of 

 an Isopod crustacean belonging to the genus Ccecidotea Pack 

 ard . 



The shrimp on examination proves to be so distinct from all 

 the Palc&monidcK hitherto described as to necessitate the erec 

 tion of a new genus. The Isopod, as it came from the type 

 locality of Ccecidotea nickajackensis Packard was at first 

 thought to be that species, but a careful comparison with Dr. 

 Packard's description and figures and with specimens of C. 

 nickajackensis from wells at Metcalf, Georgia, shows that it is 

 distinct. 



The new genus and the two new species may be described as 

 follows: 



Palaemonias gen. nov. 



Similar to Palccmonetes in form and in the absence of a mandibular 

 palpus. Gills four and a rudiment on each side. Rostrum long, slender 

 36 BIOL. Soc. WASH. VOL. XIV, 1901. (179) 



