45 



€ine grosse Zahl der seltensten und interessantcstcn Eormeu, 

 besonders aus den westlichen Staaten (Wasbingtoa lerr., 

 California etc.) befinden. Wir erwahneu nur: Aecidium 

 Gayopbyti Vize, Aecidium Pan.melii Trel. auf Luphorbia 

 corollata, Aecidium Ceanotbi, Aecidium Aesculi, Aecidium 

 Dicentrae Trel., Uromyces Rudbeckiae Arth. & Holw., 

 U versatilis Pk., Puccinia Grindeliae Peck, Puccinia Hark- 

 nessii auf Lygodesmia spinosa, P. Jonesii Peck auf Peuceda- 

 nura Suksdorfii, P. mirabilissima Peck auf Berbens, P con- 

 ^regfta Ellis & H. auf Heucbera cylindrica, P. spreta Peck 

 auf Mitella, P. digitata auf Rhamnus crocea, P. Cypnpedu 

 Artb & Holw.; ferner von Ustilagineen : Doassansia Lpilobn 

 Farlow, Entyloma Tbalictri, Entyloma Compositarura. Wir 

 wunschen der wertbvollen Sammiung guten Fortgang! 



G. W. 



F. WoUe, Fresh -Water Algae. IX. (Bullet, of Torrey 



Dot. Club. XIL No. 1.) 



Wir geben, wie von den vorbergehenden gleicbbetitelten 

 Aufsatzen, eine Uebersicbt der bier neu aufgestellten Species: 



Cosmarium lobatulum, n. 8p. — Small, one- 

 tbird longer tban wide, end of semi -cell broadly trun- 

 cate: sides convex, with slight contraction near tbe endj 

 side view circular with end truncate. Membrane finely ana 

 closely granular. Diameter 25 f*] length 33 f*. 



d inflatum, n. sp. (Figs. 18-20.) - Cell one- 

 half longer than broad; serai-cell gradually enlarged from 

 a narrow base to the broadly dilated end; end view broadly 

 elliptic; lateral view circular, with slightly flattened sides; 

 membrane finely punctate or smooth. Diameter 25--28 f*] 



length about 40 h- . ^. , 



Ponds in Minnesota. C. pseudoprotuberaus, Kir., has 



something in common with this form, but the semi-cells are 

 separated by the narrow linear sinuses between them; C. 

 inflatum has an obtuse-angled ginus. 



Xantbidium fasciculatum (Ehrb.) Ralfs., var. subal- 

 pinum, n. var. Prof. Delponte, in his Sp. Desmidiacearum 

 subj>lpinarum, p. 168, plate 13, describes this species diffe- 

 rently from that described in Des. U. S., the variation being 

 mainly in the wider separation of the lateral spines, io 

 distinguish the two I make the above variety. 



Not rare in ponds of Minnesota or New Jersey. 



X. Columbianura, n. sp. — Cells about one-tbird 

 longer than wide, divided by a deep constriction, which 

 forms much ampliated acute -angled sinuses; semi-cells ob- 



