ANNELID GENUS CAMBARINCOLA — HOFFMAN 



363 





Figure 74.— Distribution of Camharincola heterognatha, new species, an abundant Appalach- 

 ian endemic species. Each spot represents collections for one county. 



Variation. — ^There is little or no appreciable variation in this 

 species as regards size of body, shape of jaws, and general details of 

 the sex organs. There is some individual divergence in the relative 

 length of the prostate gland, which may vary anywhere from a third 

 to half the length of the spermiducal gland, irrespective of locality. 

 The single collection from Kentucky is interesting in that the prostate 

 of all specimens studied is basally much thicker than noted elsewhere 

 in the range of the species, attaining a diameter at its base at least 

 half that of the spermiducal gland. The Kentucky locality is con- 

 siderably removed from the main distribution of the species, and this 

 minor difference may reflect some significant microevolutionary de- 

 velopment due to isolation. Aside from this one departure, hetero- 

 gnatha must be considered a very homogeneous species despite its 

 considerable geographic range. 



Distribution. — The southern Appalachians, from northwestern 

 Virginia and adjacent West Virginia, south and west to central eastern 

 parts of Tennessee and Kentucky. Specimens have been examined 

 from the following localities: 



Kentucky: adair county: 8.9 miles east of Columbia on Kj\ Hy. 80, July 

 28, 1958, Holt (PCH 827). 



Tennessee: claiborne county: 3 miles southwest of New Tazewell on Tenn. 

 Hy. 33, April 16, 1951, Horton H. Hobbs and W. R. West (PCH 540). cumber- 

 land county: Daddy's Creek, between Crossville and Pikeville, August 1950, 

 Holt (PCH 419). WASHINGTON COUNTY: Hartsell Cove, Buffalo Mountain, 



