Vol XIV, pp. 179-180 September 25, 1901 



PROCEEDINGS 



OF TTIE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SUBTEERANEAN CRUSTACEANS FROM 

 THE UNITED STATES. 



P.Y 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 Cmcidotea Pack- 

 ard. 



The shrimp on examination proves to be so distinct from all 

 the PahemoindiB hitherto described as to necessitate the erec- 

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

 locality of Cmcidotea nlckajackensis 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 

 /tickajaekensis from wells at Metcalf, Georgia, shows that it is 

 distinct. 



The new genus and the two new species may be desci-ibed as 

 follows: 



Palsemonias "-en. nov. 



Similar to Pakemonetes 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) 



