121 



furnished on each side with three divergent processes, apices 

 rounded, bearing two aculei ; end view triangular, sides con- 

 cave, angles broadly truncate and produced into two pro- 

 cesses with a wdde rounded sinus between; a third process 

 from a position somewhat back of the sinus rises at an 

 angle of about 40 «, thus constituting three diverging aculei- 

 tipped processes at each of the three angles. 



Cosmarium protuberans, var. Granulatum, 



n. var. , • n • i 



Cells about one-fifth longer than broad; semicells with 



straight base, sides somewhat diverging from the basal line ; 

 superior angles nearly right, inferior angles obtuse; centrally 

 intlated ; seen from the vertex , elliptic with a swelling on 

 each side; membrane granular. Diameter 25—28 f*. 



S('parated from the typical form mainly by _ the _ rather 

 coarsely granular membrane; the central inflation is also 



less pi'ominent. 



From pond a near Minneapolis, Minn. 



Euastrum Nor dstetean urn, n. sp. 



Cells quadrangular;, oblong, nearly twice aa long as 

 broad; semicells obscurely three-lobed; basal lobes broad, 

 divided in the middle by a rounded notch into too lobules 

 with tridentate or spinous ends; end lobe short, pouting, 

 more or less emarginate; the two sides of apex usually in- 

 clining backward, with a subacute or rounded notch bet- 

 ween; lateral margins furnished with two or three horizontal 

 spines, End, transverse and side views rectangular, with 

 broad, square, more or less sinuate ends, angles dentate. 



Frequent near Minneapolis; Minn. Seen occasionally 



in New Jersey also. 



Xanthidium antelopaeum, var. Minneapoliense, 



n. var. i. • /. ^r^i. 



A new form possessing the peculiarity ot a litth pair 



of aculei immediately over the central protuberance and 

 bead-like series of granules. 



ScWes 



Herausgegeben von Prof. Dr. F. Cohu. III. Band: Pilze, 

 bearbeitct von Dr. J. ^chroter. 1. Lieferung. Breslau 1885. 



Nach jahrelangem Warten liegt uns nunmehr die 

 1 Lieferung des diePilze enthaltcndenBandes der schlesischen 

 Kryptogamen- Flora vor. In Einrichtung und Ausstattung 

 sich den vorhergchcnden Bilnden im Wescnthchen an- 

 schliesscnd, bringt dieser III. Band zunachst cine Einleitung. 

 Diese beginnt mit eincr Geschichte der Pilzkunde in bchlesien; 



9 



