172 



4 



zinn Samineln uiul Prapariren der Diatomccn in aiisgezcich- 

 netcr Qualitat bezichen, sonclcrn audi vorzii^^liche IVaparato 

 von Diatomeen. Das soeben ausgooebene Special-Prcisver- 

 zcichniss der Priiparate, Test- und Typenplatten vou Diato- 

 meen etc. entbiilt 1300 Nununern, die sicb auf rolgcn<le 

 Kategorien vertheilen: I. Einzclpraparato, II. Tesfpniparatc, 

 III. Sammelpriiparate, IV. Typenplatten von Diatonioen aus 

 fossilen Erden, i\lergcln etcf, V. Typenplatten von Diato- 

 meen aus Aufisaniinlungen von Siiss-, Brack- und Seowasser, 



VI. Typenplatten systeiiiatisch geordneter Diatomeen, 



VII. Typenplatten, je ein Genus entbaltend, VIII, Tcbt- 

 lalten, IX. grnppiite Diatomeen. Wir liaben eine Anzahl 

 raparate der verschiedcnen Kategorien eingehend gepriift 



und konnen dieselben auf's Angelegentlichste emnfelden. 

 Die Ausfulirung ist bewundernswiirdig exact, die Bestim- 

 mungen zuverlassig und die Preise selir mlissige. G. W, 



Repertorium. 



Ellis, J. B. and W, A. Kellermaiiii, New Kansas Fuii^m, 



(Scliluss.) 



Cercospora Fraxini, E. & K. 



On living leaves of Fraxinus, Manhattan, Ks,, Sej>i. 

 1884. Scattered over the lower surface of tlie leaf on small, 

 rusty brown spots, limited by the veinlcts of the leaf and 

 forming at length, by confluence, much larger (^/^ — 1 cm) 

 patches with an irregular outline. The leaf is also mottled 

 above with rusty brown in which small, liglit colored spots 

 mark the position of the denser tufts beneath, llyphae 

 densely tufted, nearly hyaline, short (10 — 25/*) lax, sbghtly 

 swollen at the base, bearing the cylindrical, nearly hyaline 

 (with a slight yellowish tinge) 3 — 4 septate^ granular and 

 nucleate conidia 70 — 100 X 5 — 6 ^ more or less curved 

 and ends obtuse. Accompanied by an immature Spacrella 

 of w^hich it is probably the conidial stage. This species 

 varies considerably from the usual type of Cercospora 

 standing rather equivocally between this genus and Ra- 

 ni u la ria. 



Cercospora Diantherac, E. & K. 



OnDiantliera Americana. Topeka, Ks. (Popenue.), 

 Sept. 1884. On round white spots, 2 — 4 mm iu diameter, 

 mostly included in brown dead areas of tlie leaf Avhich are 

 limited by a dark, narrow border. Hyphae iu small, loose 

 spreading tufts, mostly 3 — 10 in each tuft, brown, continuous 

 or sparingly and faintly septate, more or less geniculate 



