NO. 3544 SUBSPECIES OF CAMBARUS LONGULUS — JAMES 11 



County, Tenn. (map. 1, nos. 143-145). It would seem that here the 

 ecologically restricted C. longulus longirostris has been forced into 

 its isolated strongholds by the invasion of members of the genus 

 Orconectes. It is probable that these western records, especially 

 those of Lawrence County, Tenn., are relict populations. No eco- 

 logical data are available for the Lauderdale, Ala. specimens, although 

 I suspect they would conform to those of Lawrence County. The 

 northeastern Hmit is marked by the North Fork of the Holston River, 

 Bland County, Va. (map. 2, no. 186). 



That the three subspecies of C. longulus are allopatric is clearly 

 evidenced where the headwaters of separate drainage systems inter- 

 digitate. For example. White Top Creek (map 2, near no. 195) 

 northeast of Konnarock, in Smyth County, Va. (Holston di'ainage), 

 in which C. longulus longirostris is found, is less than a mile from 

 Lewis Creek (map 2, no. 248) near Troutdale, Grayson County (new 

 drainage) where C. I. chasmodactylus occurs. 



In many localities C. longulus longirostris is particularly abundant; 

 in one such locaHty (map 2, no. 195), Big Laurel Creek, Smyth 

 County, Va., Hobbs (personal communication) collected 99 specimens 

 in a single seine haul over approximately 100 square feet. 



Ortmann (1931, p. 123) wrote that C. longulus longirostris had "not 

 been found in the Tennessee River below Knox\TiUe, and the mouth 

 of the Clinch, nor in its eastern tributaries (Little River, Little 

 Tennessee, and Hiawassee [sic] Rivers)." I have recorded specimens 

 from Louden County (below Knoxville), Roane County (below the 

 mouth of the Chnch) ; Monroe County (Little Tennessee), McMinn, 

 Bradley, and Polk Counties (Hiwassee) ; also previously unrecorded 

 are localities in Lawrence County, Tenn., Lauderdale County, Ala., 

 and Armuchee Creek, Floyd County, Ga. (Coosa drainage). 



Faxon's type locaHty (1885b, p. 358) is "Doe River, Ehzabethon, 

 Carter County, Tenn.," from which he had three females. Ortmann 

 (1931, p. 121), Hobbs, and Holt subsequently have collected specimens 

 from this locality (map 2, no. 112). 



The only incorrect Usting of C. longulus longirostris of which I am 

 aware is "Cumberland Gap" (Faxon, 1885a), as previously discussed. 

 This locaUty has been repeated in Faxon (1898), Harris (1903), and 

 again in Ortmann (1931). The error is logical; except for the differ- 

 ence in chelae and the presence of lateral spines on the carapace, this 

 form is superficially much like C. longulus longirostris. 



Those locality records listed by pre^-ious authors for C. I. longulus 

 that actually apply to C. longulus longirostris are included in list III, 

 p. 7. 



