OF ARTS AND SCIEXCES. 145 



28. Cambakus DUBirs. 



Cainbariis dtibius, Faxon, supra, p. 114. 



Ilab. Mouutain region of West Virginia, Virginia, and Ten- 

 nessee. 

 2!). Cambarus Nebrascensis. 



Cambarus Nebrascensis, Girard, op. cit., p. 91. 1852. 

 Cambarus N>brasccnsis, Hagen, op. cit., p. 83. 1870 (after 

 Girard). 



Hal). Fort Pierre, Dakota. 



This species is unknown to me. Possibly it is a form of 

 C Diogenes. 



00. Cambarus Uiileri. 



Cambarus U/dcri, Faxon, supra, p. 116. 

 Hab. Lowlands of Maryland. 



01. Cambarus extraneus. 



Cambarus extraneus, llageu, op. cit., p. 73, PI. I. figs. 88, 89, 

 PI. III. fig. loG. 1870. 



Hab. Tennessee River, near the border of Georgia ; Etowah 

 River, Rome, Georgia. 



The larger female mentioned by Hagen, p. 74, is C spinosus 

 Bundy. 



32. Cambarus Girardianus. 



Cambarus Girardianus, Faxon, supra, p. 117. 

 Hab. Cyprus Creek, Lauderdale Co., Alabama. 



33. Cambarus Jordani. 



Cambarus Jordani, Faxon, supra, p. 119. 

 Hab. Etowah River, Rome, Georgia. 



34. Cajibarus cornutus. 



Cambarus cornutus, Faxon, supra, p. 120. 



Hab. Green River, near Mammoth Cave, Kentucky. 



35. Cambarus hamulatus. 



Orconectes hamidatus, Cope and Packard, Amer. Nat., XV. 

 881, PI. Vn. figs. 1, 1 a, 1 b. Nov., 1881. 



Ilab. Nickajack Cave, Tennessee. 



T am indebted to Prof. A. S. Packard for the opportunity 

 to examine six type specimens (four males, form IL, and two 

 females) of this interesting blind species. 



3G. Cambarus medius. 



Cambarus medius, Faxon, supra, p. 121. 

 Hab. Irondale, Missouri. 



VOL. XX. (X. S. XII.) 10 



