54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



bartonii at 24, 29, 57. 63, 66, 87, 89 93, 07; with O. I. longulus at 20. 



•JO. 88 93, L12; and with (\ sciotcnsis at all stations except 20. 24, 20. 

 87 93, 112. 



Ostracod associates include An. ancyla at stations 88, SO, 02. 93, 

 Pn. ardis at 20: Dn. Ueata at all stations except 87-93, 112; Dn. 

 truncate at 55, 57, 87, 88, 00, 01. 03: Pt. daphnioides at 72. 73. 75, 79, 

 SI. 110: Pt. t'a kata at 87-93, 112: E. internotalus at 88, 90; E. kanawha- 

 ensis at 126; and P. phyma at 24. 



Branchiobdellid associates include A. koronaeus at stations IS. 20. 

 72. 87-93, 112: .1. legaeus at SI; B. illumina-tus at 20. SO. 87, 07; 

 C.jattax at all stations except 20. 20. 73. W, 03. 104, 112, 110; ( . 

 heUrognaiha at 24. 03. 05-07. 72. 70. SI. SO, 07. 110. 120: O. holostoma 

 at IS. 20: O. vngens at 15. IS. 58, 07. 72. 73. 75. 70. SI. SO. 07. 104, 

 110: C. Philadelphia at 20. 24. 20. oo. 00. 87-93, 112: P. alcicornus 

 at 15. IS. 24. 43. 58, 03. 65-67, 72. 73. 75. 70. SI. SO. 07. 104; Xd. 

 formosus at 88-92, 112: and Xg. insiabUus at 24. SO. and 07. 



Remarks. — Cambarincola branchiophila does not exhibit the "para- 

 sitic faeies" to the extreme extent that B. iUuminatus does. Two 

 explanations of the association of these species are possible: O. branchi- 

 ophila may be incompletely adapted to the gill chamber habitat and 

 is occasionally found outside the gill chambers, or. more likely, the 

 association is due to the occurrence of these two species on separate 

 individuals of the host from the same collection. 



CtimlMirincola fallax Hoffman 



Figures loci-b 

 Cambarincola fallax Hoffman, 1903, p. 356. 



Diagnosis. — Upper lip with short, slender peristomial tentacles; 

 prosomites raised; dental formula 5 5, jaws of same size and shape; 

 prostate with terminal bulb and histologically dissimilar to spermidncal 

 gland. 



Range. — From northern Xew York to northern Georgia in the 

 mountains and piedmont. 



Specimens examined. — More than 300 specimens in 35 collections 

 from the following stations: 3, 5, 15. IS. 24, 40. 43. 49. 54-5S, 01, 

 03. 65-67, 70-72, 75. 78, 70. SI. SO-SO. 91. 02. 95-97. and 120 at eleva- 

 tions from 439 to 1158 m. This species, common to the three drain- 

 age systems of the area, appears to be somewhat less common in the 

 James than in the others: it was taken twice (sta. 11 and 24) from 

 Johns Creek. 



Hosts and associates. — Cambarincola fallax was associated with 

 Cambarus acuminatum at stations S7-S9. 91. 02: with C. b. bartonii at 

 3, 5, 24, 49, 54. 57, G3, 00. 71, S7, S9, 91, 92, 95-97; with C. carulinuj 



