OF ARTS AND SCIENCES. 145 



28. Cambarus dubius. 



Camba7'us dubius, Faxon, supra, p. 114. 



Hab. Mountain region of West Virginia, Virginia, and Ten- 

 nessee. 



29. Cambarus Nebrascensis. 



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



Cambarus Nebrascensis, Hagen, oj). cit., p. 83. 1870 (after 

 Girard). 



Hab. Fort Pierre, Dakota. 



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

 C. Diogenes. 



30. Cambarus Uhleri. 



Cambarus Uhleri, Faxon, supra, p. 116. 

 Hab. Lowlands of Maryland. 



31. Cambarus extraneus. 



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

 PI. ni. fig. 156. 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. Cambarus cornutus. 



Cambarus cornutus, Faxon, supra, p. 120. 



Hab. Green River, near Mammoth Cave, Kentucky. 



35. Cambarus hamulatus. 



Oixonectes hamulatus, Cope and Packard, Amor. Nat., XV. 

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



Hab. Nickajack Cave, Tennessee. 



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

 to examine six type specimens (four males, form l\., and two 

 females) of this interesting blind species. 



36. Cambarus medius. 



Cambarus medius, Faxon, supra, p. 121. 

 Hab. Irondale, Missouri. 



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