Algae. — Fungi, Bacteria und Pathologie. 



541 



autumn and Winter Disco- and Sphaeroplankton, in 

 spring Chaetoplankton, in summer partly Styli- and 

 Scoticaplankton, partly Longipesplankton. On the 

 other band in the fjords and sounds the changes take place 

 not so regurlarly; here Siraplankton is the first spring- 

 plankton, then follows Contortoplankton; in the early summer 

 the regularity is broken, in some years Phaeocystis and Rhizosolenia 

 obtasa, in other years Nitzschiaplankton or Constricto- 

 plankton predominate; Iateron S o le n iapl ankto n (characteri- 

 zedby Rhyz.Shoubsolli,R.faeroensis and Thalassiosira bioculata) 

 is observed: lately in the autumn and in Winter the neritic asso- 

 ciations are wanting and the poor oceanic disco- and Sphaero- 

 plankton take their places also in the fjords and sounds. 



Concerning the geographical distribution of the 

 species the following table show the division : 



The arctic species are almost absent around the Faeröes; 

 further the oceanic species prevail over the neritic ones. 



At last the author points out that the Faeöes afford an 

 exceptionnally favourable Station for the study of the living 

 plankton, as there are few places where we have the ocean 

 so available. C. H. Ostenfeld. 



ATKINSON, Geo F., A new species of Calostoma. (Journal of 



Mycology. IX. Febr. 1903. p. 14—17.) 



Calostoma microsporum Atkinson n. sp., collected at Rugby, 

 Tennessee by M. S. Percival, is described and a füll discussion is 

 made of various points of resemblance and difference between species of 

 this genus. G. G. Hedgcock. 



Clements, F. E., Nova Ascomycetum Genera Species- 

 que. (Bull. Torrey Bot. Club. XXX. 1903. p. 83—94.) 



The following list is given: 



Chaetosphaeria Thalictri, in caulibus mortuis Thalictri sparaiflora, 

 Pleosphaeria Lithospermi, ad caules mortuos Lithospermi parviflori, 

 Trichosporuim (Sacc): Tichosporium Edwiniae, ad ramos decorticatos 

 Edwiniae Americanae, Mycosphaerinm lineatum, ad caules emortuos 

 Pedicularis procerae, Phorcys minutus, ad folia vetusta exsiccataque 

 Yuccae glaucae, Metasphaeria Opulastri, ad ramulos vetustos Opulastri 

 inonogynae. Leptosphaeria Castilleiae, ad caules emortuos Castilleiae 

 pallidae, Pleospora Edwiniae, ad ramos siccatos Edwiniae Americanae, 

 Pleospora sepulta, ad ramos ignotos vetustos decorticatosque, Psilo- 

 thecium: Psilothecium incurvum, ad lignum udum decorticatumque Salicis 

 chlorophyllae, Stictis Edwiniae, in ramis corticatis Edwiniae Americanae, 



