ANNELID GENUS CAMBARINCOLA — ^HOFFMAN 351 



17709). PARKE county: 5.6 miles west of Bellmore on U.S. Hy. 36, July 26, 

 1958, Holt (PCH 807). 



Kansas: harper county: 10.7 miles west of the county line on Kans. Hy. 

 14, July 8, 1958, Holt (PCH 776). 



Kentucky: clark county: 9.7 miles east of Winchester on Ky. Hy. 15, 

 July 30, 1958, Holt (PCH 839). jackson county: 0.1 mile south of the Owsley 

 County line on Ky. Hy. 30, July 29, 1958, Holt (PCH 834). madison county: 

 Otter Creek, 9.3 miles north of Richmond on U.S. Hy. 227, July 30, 1958, Holt 

 (PCH 841). OWSLEY county: Traveler's Rest, July 29, 1958, Holt (PCH 835). 

 POWELL county: 1.4 miles east of Slade on Ky. Hys. 11 and 13; also Natural 

 Bridge State Park, both July 29, 1958, Holt (PCH 836, 837). 



Missouri: phelps county: Rolla, J. Barley (USNM 17713, the holotype). 

 WASHINGTON COUNTY: Irondale, August 28, 1931, Robert Rice (PCH 168). 



Oklahoma: comanche county: Blue Beaver Creek in Fort Sill, June 6, 1959, 

 J. W. Berry (PCH 905). 



Tennessee: Humphreys county: Hurricane Creek, 10.2 miles east of Waverly 

 on U.S. Hy. 70, July 5, 1958, Holt (PCH 756). 



Remarks. — Goodnight (1940, p. 37) has emphasized the pronounced 

 elevation of prosomites over metasomites as diagnostic of the species, 

 and most specimens are so formed, but contracted individuals of 

 many branchiobdellids likewise assume a distinctly annulated ap- 

 pearance. The larger size of the dorsal jaw is a good character for 

 recognition of chirocephala over most of its range, but it must be 

 recalled that in Kentucky this character loses must of its significance. 



The affinities of chirocephala are discussed in connection with 

 C. jihiladelphica; in brief, the likehhood of a genetic continuum between 

 the two seems good. However, the actual details of this relationship 

 are not clear at this time. Whether chirocephala represents the fairly 

 recent modification of a westwardly migrating philadelp)hica-Biock. or 

 whether it is an allopatrically differentiating species now radiating 

 from its place of origin and intergrading with the original parent 

 population remains to be established. 



The name chirocephala (Gk. chiros, hand, and cephalos, head) pre- 

 sumably refers to the dorsal lobation of the peristomium, but it is 

 not particularly appropriate since none of the material examined 

 is more distinctly lobed than most specimens of even C. philadclphica, 

 and in no way approximates the conspicuous tentaculation of fallax 

 and some other species. Ellis himself misidentified the Indiana 

 material cited as philadelphica, the records being originally published 

 in the same paper as the description of chirocephala! The Indiana 

 worms were merely mounted in such a way that the jaws could not 

 be seen in dorsal aspect. 



Catnharincola macrodonta Ellis 



Figures 37, 38, 55, 56, 57 



Canibarincola macrodonta Ellis, 1912, Proc. U.S. Nat. Mus., vol. 42, p. 481, figs. 

 1-3; 1919, Proc. U.S. Nat. Mus., vol. 55, p. 257 (Colorado records only?).— 



