340 Wisconsin Academy of Sciences, Arts, and Letters . 
var. Westii G. M. Smith 
Butterfly (rr), Clear (2) (rrr), Little Dudley (rrr), Otter (rrr). 
The spines of the specimens from Clear Lake were somewhat 
longer than those of this variety from other stations and reached 
a length of 22.5 /x. 
var. maximum W. & G. S. West 
Harbon (rrr), Marion (rrr), iStrange (rrr). 
COELASTRUM Nageli 1849 
COELASTRUM MICROPORUM Nag. 
iBlack (1) (rrr), Brush (r), Burned Rock (rrr), Butterfly (rrr), 
Harbon (rrr), Joseph (rrr), Rosseau (rrr), Silver (2) (rrr), St. Mary 
(rrr), Vernon (rrr). 
Coelastrum CAMBRicuM Archer 
Basil (rr), Big Dudley (rr), Black (1) (r), Brush (rrr), Butterfly 
(rrr), Cornell (rr), Echo (rrr), Gull (1) (rrr), Harbon (rrr), Leech 
(rrr), Little Dudley (rr), Loon (rrr), Marion (rr), Nine Mile (rr), 
Otter (rrr), Round (1) (rrr), Round ( 2 ) (rrr), Silver (1) (rrr), Thomp¬ 
son (rrr), Vernon (r), White (r). 
var. intermedium (Bohlin) G. S. West 
Jour. Linn. Soc. Bot. 88: 137. 197. 
Coelastrum pulciirum var. intermedium Bohlin, iBih. Kgl. Svenska Vet- 
Ak. Handl. 28, Afd. 3, No. 7; 85. PI. 2, figs. 16, 71. 1897. 
Butterfly (rrr). 
Coelastrum Morus W. & G. S. West 
Jour. Bot. 84; 381. PI. 361. fig. Jf. 1896; Trans. Roy Soc. Edinb. 41: 
607. PI. 6, fig. 12. 1905. 
Diameter of cells 10-12 /x. Diameter of colonies 35-38 /x. 
Silver (2) (rrr). 
The record for this species is based upon two colonies. The 
dimensions given above are smaller than the Wests give, and the 
presumption is that the colonies observed in Silver Lake were 
immature. 
SORASTRUM Kiitzing 1845 
SORASTRUM SPINULOSUM Nag. 
Basil (rrr), Harbon (rrr). 
