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PROCEEDINGS OF THE NATIONAL MUSEUM 



19, 21-23, 25, 37; with C. carolinus at 22; with C. I. longulus at 7, 10, 

 11, 13, 20-23, 25, 37; with C. sciotensis at 18, 19; and with 0. juvenilis 

 at 7. 



Ostracod associates include As. asceta and Dt. chalaza at station 22 ; 

 Dn. ardis at 10, 11, 13, 20, 21, 23, 25, 37; ZM. ileata at 7, 10, 11, 18-23, 

 25, 37; Dn. scalis and P. phyma at 7; and E. internotalus at 23. 



Branchiobdellid associates include A koronaeus at stations 18, 19; 



B. illuminatus at 19, 20, 22; C. branchiophila at 18, 20; C. jallax and 



C. ingens at 18; C. philadelphica at 10, 19-22, 25, 37; P. alcicornus at 

 18, 19, 25; Xd. formosus at 10, 21; and Xg. instabilius at 7, 11, 13, 21, 

 22, and 37. 



Remarks. — Cambarincola holostoma, on the basis of present knowl- 

 edge, appears to be a highly localized species that has recently in- 

 vaded the headwaters of Sinking Creek from the nearby tributaries 

 of the James River. 



Figure 17. — Cambarincola holostoma: a, lateroventral view of entire animal; b, lateral view 

 of male reproductive system and spermatheca; c, dorsolateral view of jaws; d, lateral 

 view of jaws. (After Hoffman, 1963.) 



Cambarincola ingens Hoffman 



Figures 18a-d 

 Cambarincola ingens Hoffman, 1963, p. 333. 



Diagnosis. — Upper lip of peristomium with four long lobes or 

 short tentacles; prosomites only moderately greater in diameter than 

 metasomites; dental formula 5/4 or 3/4; prostate longer than spermi- 

 ducal gland and bent back upon itself; large worms, to 6 mm after 

 preservation. 



Range.^ — Blue Ridge and Valley and Ridge physiographic provinces 

 of the southern Appalachians, in the New and Tennessee river drainage 

 systems of West Virginia, Virginia, North Carolina, and Tennessee 

 and the Roanoke (Smith River) drainage in Patrick County, Va. 



