140 A CATALOG OF ILLINOIS ALGAE 



HYALOTHECA Ehrenberg, 1841 



H. DissiLiENS (Smith) Breb. West & West, Brit. Desmid. 5: 229. pi. 



161. f. 16-27 (1923). 



Transeau 1916, p. 125: Coles, Ashmore, Charleston — small 

 stream from pond and ponds (May-July, Nov.). Britton: Cook, 

 Evanston — North Shore Channel at Simpson St., June 22, 1939, 

 #304; Palos Park— small pond, July 14, 1939, #578; Schnells 

 Corner— pond at Elk Grove Forest Preserve, June 23, 1938, 

 Aug. 8, 1939, #93, 790. Transeau: Jasper, Wheeler— pond 

 (Sept.). Britton: Lake, Volo^ — bog at Tamarack Farm, June 3, 

 1939, #293, 294; Wauconda— Bangs Lake, Aug. 24, 1939, #920. 



H. MUCOSA (Mert.) Ehr. West & West, loc. cit., p. 235. pi. 162. f. 1-4 



(1923). 



Britton: Cook, Sag Bridge— swamp, July 13, 1939, #495. 



MICRASTERIAS Agardh, 1827 



M. AMERICANA (Ehr.) Ralfs. West & West, Brit. Desmid. 2: 117. pi. 



53, 54. f. 4, 5, 1-3 (1905). 



Transeau: Clark, Casey^ — stream (Apr.). Coles, Ashmore, 

 Charleston — ponds and small stream (May, June, Nov.). Brit- 

 ton: Cook, Sag Bridge — small pond, July 13, 1939, #505. Tran- 

 seau: Douglas, Arthur — pond (May). Eddy 1931B, pp. 451, 462: 

 Pulaski, Wetaug — sink-hole ponds (Apr.). 



M. ROTATA (Grev.) Ralfs. West & West, loc. cit., p. 102. pi. 48. f. 1-6 



(1905). 



Britton : Lake, Volo — bog at Tamarack Farm, June 3, 1939, #293, 

 294. 



M. TRUNCATA (Corda) Breb. West & West, loc. cit., p. 82. pi. 42, 45. 



f. 1-8, 5, 6 (1905). 



Transeau: Coles, Ashmore, Charleston- — ponds (June, Nov.). 

 Britton: Lake, Volo — bog at Tamarack Farm, June 3, 1939, 

 #293. McHenry, Harvard — swamps about 2 miles E., July 7, 

 1939, #420; Woodstock— small pond about 1 mile S.E., July 8, 

 1939, #434. 



ONYCHONEMA Wallich, 1860 



O. LAEVE var. LATUM W. & G. S. West. Smith, Bull. Wis. Geol. & 

 Nat. Hist. Surv. 57 (2): 136. pi. 86. f. 15 (1924). 



Britton: Cook, Sag Bridge— small pond, Sept. 8, 1939, #996, 998. 



PENIUM Brebisson, 1844 



P. MARGARITACEUM (Ehr.) Breb. West & West, Brit. Desmid. 1 : 83. 

 d1. 8. f. 32-35 (1904). 



