52 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



45, 48, 51, 59, 76, 86, 97, 122, 125; Dn. scalis at 17, 44, 68, 115; Dn. 

 truncata and Dt. falcata at 87; E. kanawhaensis at 44; and P. phyma 

 at 5 and 44. 



Branchiobdellid associates include A. koronaeus at stations 19, 87, 

 125; O. branchiophila at 20, 86, 87, 97; C. jallax at 5, 40, 86, 87, 97; 

 C. heterognatha at 5, 34, 45, 48, 86, 97, 122, 125; C. holostama at 19, 20, 

 22; C. ingens at 5, 86, 97; C. philadelphica at all stations except 40, 

 41, 86, 97, 127; P. alcicornus at 5, 19, 76, 86, 97; and Xg. instabilius 

 at 5, 22, 44, 86, 97, and 121. 



Remarks. — Bdellodrilus Uluminatus is an indisputable gill-inhabiting 

 species. Often it is the only branchiobdellid associate of the bur- 

 rowing C. carolinus, the only crayfish species with which it was found 

 to occur more often than would be expected by chance. 



Figure 13. — Bdellodrilus Uluminatus, lateral views: a, entire animal; b, jaws. 



Genus Cambarincola Ellis, 1912 



Diagnosis. — Body terete without specialized projections; anterior 

 nephridia opening through common pore on dorsum of segment III; 

 deferent ducts entering ental end of spermiducal gland; prostate and 

 ejaculatory duct both present; penis noneversible ; bursa subpyriform 

 to obcordate; spermatheca never bifid. 



Cambarincola branchiophila Holt 



Figures 14a-c 

 Cambarincola branchiophila Holt, 1954, p. 168. 



Diagnosis.^ — Gill-inhabiting branchiobdellid; lips entire; dental 

 formula 5/5, with lateralmost teeth longer than teeth between them 



