CLASSIFIED CATALOG OF ILLINOIS ALGAE 131 



Z. EXCRASSUM Trans. Transeau, et al., Trans. Amer. Mic. Soc. 53: 



209. pi. 27. f. 14 (1934). 



Zygnema pectinatum var. cvassum Trans. 



Transeau 1915, p. 21; Collins 1918, p. 7, as Z. p. var. crassum; 

 Transeau, et al. 1934, p. 209: Clark, Casey— pool (May). 



Z. INSIGNE (Hass.) Kuetz. Collins, Tufts Coll. Stud. 2(3): 104 (1909). 

 Transeau 1913B, p. 74; 1916, p. 124: Clark, Casey— pond (Apr.). 

 Coles, Ashmore, Charleston, Lerna — ponds, pools, ditches and 

 small intermittent streams (Apr.-June), on soil (May). Cumber- 

 land, Greenup — pond (Apr.). Douglas, Areola — ditch (May). 

 Britton : Lake, Everett— small pond 1 mile S., May 15, 1938, #71. 



Z. LEiosPERMUM DcBary. Collins, loc. cit. (1909). 



Transeau 1916, p. 124: Coles, Charleston— pools (May). Britton: 

 Lake, Northbrook — small pond at Somme Forest Preserve, 

 May 15, 1938, #68. 



Z. NEOCRUCIATUM Trans. Transeau, et al., Trans. Amer. Mic. Soc. 53: 



212 (1934). 



Transeau, et al. 1934, p. 212. 



Z. NEOPECTINATUM Trans. Transeau, et al., loc. cit., p. 209. pi. 27. f. 7 



(1934). 



Transeau, et al. 1934, p. 209. 



Z. PECTINATUM (Vauch.) Ag. Collins, Tufts Coll. Stud. 2(3): 103 



(1909). 



Zygnema pectinatum var. anomalum (Ralfs) Kirch. ; Z. pectinatum 

 var. decussatum (Vauch.) Kirch. 



Transeau 1913B, p. 74, also as Z. p. var. anomalum and decus- 

 satum; 1913C, p. 40; 1915, p. 21; 1916, p. 125: Clark, Casey- 

 pond (Apr., May). Coles, Ashmore, Charleston, Lerna — ponds, 

 pools, ditches and small streams (all months), laboratory aquaria 

 (July). Jasper, Newton — small stream (Apr.); Wheeler^ — pond 

 (Apr., Aug.). Lawrence, Lawrenceville — ditch E. of (May). 

 Montgomery, CofTeen — ponds (May, June). 



Z. STELLINUM (Vauch.) Ag. Collins, loc. cit., p. 104 (1909). 



Transeau 1913B, p. 74; 1913C, p. Z2>; 1915, p. 22; 1916, p. 124: 

 Clark, Casey— pond (Apr.); Oilfield— ditch (May). Coles, Ash- 

 more, Charleston, Lerna — ponds, pools, ditches, bayous and 

 small streams (Mar .-July), on soil (May), laboratory aquaria 

 (Dec). Cumberland, Greenup — ponds (Apr.), ditch pools 

 (Nov.); Jewett — pond S.W. of (May). Edgar, Paris — reservoir, 

 ditches and pools (Mar., Apr.). Lawrence, Lawrenceville — 

 Beaver Ditch and gravel pit 5 miles N.E. of (Apr., Aug., Sept.); 

 Pinkstaff — ponds E. of (Mar., Apr.). Montgomery, Waggoner — 

 wet-weather pond (Dec). Richland, Calhoun — pools and slough 

 of Bonpas Creek (Apr.). 



