CRAYFISHES — HOBBS, HOLT, AND WALTON 



59 



Specimens examined. — Approximately 80 specimens in 20 collec- 

 tions from the following stations: 5, 15, 18, 54, 58, 61, 64, 67, 70, 72, 

 73, 75, 79-81, 86, 95, 97, 104, and 116. All of these stations are in 

 the New River drainage at elevations from 488 to 777 m. 



Hosts and associates. — Cambarincola ingens was associated with 

 Cambarus b. bartonii at stations 5, 54, 64, 95, 97; and with C. sciotensis 

 in all stations. 



Ostracod associates include Dn. ileata at all stations except 70; 

 Dn. truncate at 54; Dt. daphnioides at 70, 72, 73, 75, 79-81, 116; and 

 P. phyma at 5, and 64. 



C 



d 



Figure 18. — Cambarincola ingens, lateral views: fl, anterior portion of entire animal; 

 b, male reproductive system. En face vkws: c, upper jaw; d, lower jaw. 



Branchiobdellid associates include A. koronaeus at stations 18, 72; 

 A. legaeus at 81; B. illuminatus at 5, 86, 97; C. branchiophila at 15, 

 18, 58, 67, 72, 73, 75, 79, 81, 86, 97, 104, 116; C. fallax at 5, 15, 18, 

 54, 58, 61, 67, 70, 72, 75, 79, 81, 86, 95, 97; C. heterognatha at 5, 61, 

 64, 67, 70, 72, 79-81, 86, 97, 116; C. holostoma at 18; C. philadelphica 

 at 5, 54; P. alcicornus at 5, 15, 18, 58, 61, 64, 67, 70, 72, 73, 75, 79, 

 81, 86, 95, 97, 104; and Xg. instabilius at 5, 54, 61, 64, 86, 95, and 97. 



Remarks. — On the basis of presently known distribution records, 

 C. ingens is a native of the New River that has spread to only a few 

 other drainage systems, notably the Tennessee. Our data positively 

 associates C. ingens only with Cambarus sciotensis as a host, but it 

 is known that other crayfishes serve as hosts for this branchiobdellid. 

 (Hoffman, 1963, p. 336.) 



