104 



Es ist dies wahrscheinlich derselbe Pilz, den SioegazzinI 

 (Fungi Argcntini IV, pag. 43) als Conidienform seiner 

 Meliola penicillata beschreibt. Ich besitze diese Art auch 

 aus Florida durch Calkins. 



Repertorium. 



F. Wolle, Fresh -Water Algae. IX. (Bullet, of Toney 



Bot. Club. XII. Nr. 1.) 



(Schluss.) 



Staurastrum cornutum, n. sp. (Figs. 3 and 4.) 

 Medium size, about one- fourth longer than wide, smooth f 

 serai-cell oval or broadly elliptic, with a prominent, some- 

 what inwardly curved aculeus on each side; end view trian- 

 gular, angles rounded, each with a firm spine, sides straight 

 or slightly concave. Diameter 55—60 /t; length about 70 i". 

 Spines not included in these measurements. 



The front view resembles that of Arthrodesmus con- 

 vergens, Ralfs, but the triangular end view proves it to be 

 quite distinct. 



St. Anthony Park and other localities, Minn. 



St. vesiculatum, n. sp. — Small, smooth, about 

 one-half longer than wide; constriction deep, sinuses acute 

 angled, much ampliated ; semi-cell short, ovate or sub-pyra- 

 midal, not so long as broad; base wide, lower angles roun- 

 ded, sides convex and inclining to the rounded apex; end 

 view triangular, angles rather broadly rounded, sides shghtly 

 convex or straight. Diameter 31 /it; length 45 /u. 



Differs from St. cordatum, F. Gay, in front view ; sinuses 

 are not narrow linear, but much ampliated, thereby giving 

 the cell a more elevated appearance. 



Green's Lake, New Jersey. . 



St. xiphidiophorum, n. sp. (Figs. 21 and 22.) 

 Small, one-half longer than broad; deeply constricted, sinus 

 narrow, rounded at base and widened irregularly; semi-cell 

 transversely oblong, with lateral margins notched; the end 

 margin drawn out into a sort of onesided, hastate, poig- 

 nard-like spines, or slender points, about nine in number; 

 membrane smooth, with several scrobiculaj; end view trian- 

 gular, angles broadly truncate and usually three-loBed, each 

 lobe with a vertical spine; sides concave. Diameter 25 

 30 |m; length 40 /u. 



Near Stillwater and Minneapolis, Minn. 



