358 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



Spermatheca rather small, generally similar to that of C. phila- 

 delphica, composed of a slender ectal duct and an ovoid or fusiform 

 ental bulb located about halfway up one side of segment v, no glan- 

 dular ental process detected. 



Variation. — Individual variation in body form and peristomial 

 shape is shown in figures 58-60. The two most similar worms are 

 from opposite extremes of the range. 



The male reproductive system varies somewhat more than in most 

 other members of this genus, particularly with respect to size of the 

 spermiducal gland, but nothing has been noted to indicate any sort 

 of geographic dispersion. Figure 62 shows the typical proportions 

 of the larger organs. The spermatheca is likewise somewhat vari- 

 able, particularly the appearance of the ental bulb. This, however, 

 is pretty clearly a reflection of the degree of distention by its contents. 



Distribution. — ^Known from numerous localities throughout the 

 Appalachian uplift and adjacent Piedmont from western New York 

 south as far as central western Georgia. In the southern part of 

 the Temgefallax appears to be the most abundant member of the genus, 

 further north the records are more scattered and C. philadelphica 

 becomes dominant. Material has been examined from the following 

 localities : 



Georgia: fannin county: 5.7 miles south of Morganton on Ga. Hy. GO, 

 November 6, 1958, K. Simonds (PCH 909). mtjrray county: Holly Creek, 

 10.6 miles north of the Gordon County line on U.S. Hy. 411, April 16, 1958, Holt 

 (PCH 737). PIKE county: Large stream on outskirts of Zebulon, April 17, 1958, 

 Holt (PCH 740). WHITE county: Small ravine, 1 mile south of Helen, July 11, 

 1958, Hoffman (PCH 877). 



North Carolina: cherokee county: Beaver Creek, 0.5 mile northwest 

 of Andrews, June 9, 1959, Simonds (PCH 912). clay county: 3 miles south 

 of Tuni Gap on the Hayesville- Andrews road, June 5, 1959, Simonds (PCH 918). 



Tennessee: monroe county: Small woodland stream, 7 miles north of 

 Madisonville on U.S. Hy. 411, April 16, 1958, Holt (PCH 738). polk county: 

 2.3 miles south of Ocoee on U.S. Hy. 411, June 9, 1959, Simonds (PCH 907). 



Virginia: albemarle county: Tributary to Rivanua River near Stony Point, 

 April 25, 1947, Holt and Hobbs (PCH 45, 46). Buckingham county: 9.6 miles 

 south of Sprouses Corners on Va. Hy. 15, November 9, 1946, Hobbs and Hoffman 

 (PCH 36). charlotte county: 8.8 miles south of Keysville on Va. Hy. 15, 

 November 9, 1946, Hobbs and Hoffman (PCH 38). giles county: Sinking 

 Creek at Va. Hy. 700, near Newport, July 3, 1950, Holt, Tuten, and Kizer (PCH 

 407). PATRICK county: Shooting Creek, 1.6 miles south of the Frankhn County 

 line on Va. Hy. 40, April 13, 1953, Hobbs (PCH 723). tazewell county: Maiden 

 Spring Creek, about 1 mile east of Wardell, June 19, 1959, Hoffman (PCH 904, 

 type series). 



New York: tompkins county: Owasco Inlet, 3 miles south of Groton, May 18, 

 1951, E. C. Raney (PCH 628). County not located: Reeder's Creek, 1949, L. C. 

 Goldstein (PCH 245). 



