Algen. — Fungi. — Pathologie. 43 



genus Navlciila scopiiloriim (= N. johnsonii VV. Sm.) with 

 varieties fasclciilata , perlonga, belgica, and delicatula nov. var. 

 Two new species are created, O. pontica and O. granulata. An 

 analytical key to the species and varieties concludes the paper. 



Ethel S. Barton. 



Mereschkowsky , C, On Staiironella , a new genus ot 

 Diatoms. (Annais and Magazine of Natural History. Vol. 8. 

 No. 47. Nov. 1901. p. 424—434. pl. Vlll. fig. im Text.) 



This genus is formed for the reception ol Stauroneis con- 

 stricta Ehr. and its varieties, on the character of the endrochome. 

 The chromatophores consist of „two plates disposed trans- 

 versely along one of the connecting zones ; each plate with a 

 conspicuous pyrenoid". Staiironella is nearly allied to Amphi- 

 prora, and these genera, together with Aiiriciila, Epithemia 

 and Amphoropsis, represent, according to the author, „a rem- 

 nant of a very old, now almost extinct, group of diatoms", 

 vvhich he proposes to call Archaicleae. This group he regards 

 as being the ancestors of the Raphideac and Carinatae. The 

 author attributes much importance to a consideration of en- 

 dochrome in connection with a Classification of diatoms; 

 and as the result of a study of not less than 150 living forms 

 of Naviciilaceae and Nitzschieae he states that the endrochome 

 in these two groups is of a diametrically opposed type. The 

 typical number of chromatophores is two in both cases, but 

 those of Naviciilaceae have a longitudinal disposition, while 

 those of Nitzschieae are arranged transversely. 



_'_ 'Ethel S. Bar ton. 



Von Schrenk, H. , A d i s e a s e o f the b 1 a c k 1 o c u s t 

 Robinia pseiidacacia. (Report Missouri Botanical Garden. 

 XII. p. 21—31. pl. 1—3.) 



Disciission of the effects of the growth of Polyporiis rimosuSj 

 in connection with the questions of parasitic, saprophytic and 

 hemisaprophytic habit of growth in fimgi. Trelease. 



Banher, H. J., APreliminary Contribution to a Know- 

 ledge of the Hydnaceae. (Bulletin of the Torrey Botanical 

 Club. XXVIII. 1901. p. 199.) 



Verf. beschreibt, mit Litteraturangabe, kurz 40 Arten von Hydnum, 

 der Abtheilung ^,Mesopns'' angehörig. Ein erläuternder Schlüssel verein- 

 facht die Bestimmung der Arten dieser verworrenen Gattung. 



von Schrenk (St. Louis). 



Durand, E. J., S t u d i e s in North American Discomycetes. 



I. The Genus Holwaya Sacc. (Bulletin of the Torrey 



Botanical Club. XXVIII. 1901. p. 349—355.) 



Verf. beschreibt des längeren die Synonymie einer Discoinyceten-hvU 

 den Patellariaceen angehörig, die er als Holwaya gigantea (Pech.) Durand 

 anerkennt. Eine Tafel ist beigegeben. von Schrenk (St. Louis). 



