CLASSIFIED CATALOG OF ILLINOIS ALGAE 143 



Eddy 1930, pp. 292, 297, as Peridinium cunningtonii and P. 

 quadridens: Illinois-Mississippi Canal; "several lakes in central 

 Illinois." 



Family: PERIDINIACEAE 



PERIDINIUM Ehrenberg, 1832 



P. BiPES Stein. Schiller, loc. ciL, p. 159. f. 157a-i (1937). 

 Peridinium tabulatum (Ehr.) Clap. & Lachm. 



Eddy 1934, pp. 396, 397, as P. tabulatum: Champaign, Seymour 

 —temporary pond (Feb.-May, Oct.); Urbana — ox-bow pond 

 (Feb.-Apr.). Jelliffe 1893, p. 311; Eddy 1927B, pp. 209, 225, as 

 P. tabulatum: Cook, Chicago — Lake Michigan (Aug.). Hempel 

 1896, p. 310; 1898, p. 329, as P. tabulatum: Fulton — Thompson's 

 Lake (July, Aug.). Hempel, loc. cit. (1896, 1898); Kofoid 1908, 

 pp. 68, 84, 323, as P. tabulatum: Mason, Havana — Illinois River 

 (all months); Matanzas Lake (July, Aug.). Kofoid 1899, p. 421; 

 1900, p. 543, as P. tabulatum: Co. ? — "almost always repre- 

 sented." Eddy 1930, p. 298, as P. tabulatum: Co. ?— "ponds and 

 streams." 



P. ciNCTUM (Muell.) Ehr. Schiller, loc. cit., p. 152. f. 152a-k (1937). 

 Eddy 1931 B, pp. 453, 455, 464: Pulaski, Wetaug— sink-hole 

 ponds (Apr., July, Sept., Dec). Eddy 1930, p. 292 : Whiteside- 

 Rock River. Co. ?— cypress swamps along the Ohio River. 



P. iNCONSPicuuM Lemm. Schiller, loc. cit., p. 173. f. 175a-w, z (1937). 

 Eddy 1930, p. 295: Henry (?)— Illinois-Mississippi Canal. 



P. PUSILLUM (Penard) Lemm. Schiller, loc. cit., p. 175. f. 177a-f 



(1937). 



Eddy 1930, p. 297: Co. ?— "in limestone sinks in southern Illi- 

 nois." 



P. UMBONATUM Stein. Schiller, loc. cit., p. 171. f. 174a-l (1937). 



Eddy 1930, p. 299: Henry, Colona — in Hennepin (Illinois- 

 Mississippi) Canal. Whiteside, Sterling— in Rock River. 



Family: HETERODINIACEAE 



CERATIUM Schrank, 1793 



C. CORNUTUM (Ehr.) Clap. & Lachm. Schiller, loc. cit., p. 363. f. 399 

 (1937). 



Kofoid 1908, p. 72: Mason, Havana — Illinois River (June). 

 C. HIRUNDINELLA (O. F. M.) Schr. Schillcr, loc. cit., p. 359. f. 393- 

 397 (1937). 



Ceratium kumaonense Carter. 



Hempel 1898, p. 330 (Fulton, Mason). Kofoid 1899, p. 421 ; 1900, 



