Algae. — Fungi, Bacteria und Pathologie. 199 



obtained on this point. In a considerable number of the young plants 

 of the same species of Oedogoninm the apical cell was provided with a 

 longer or shorter cap of stratifled cell-wall substance with square corners, 

 so that the apex of the filament had a rectangular appearence; this was 

 found to be the result of repeated formation of cellulose-thickenings^ 

 unaccompanied by the usual subsequent stretching, and was developed 

 in plants, which were not typically submerged. It is pointed out that 

 the structure of these peculiar caps of thickening tends to support 

 Wille 's view as to the mode of origin of the normal ring of thickening 

 of the Oec/ogo/iiuin-ceU. — Finally the occurrence of large fat-globules 

 in cells of young plants of this genus, growing under slightly abnormal 

 conditions, is commented on. F. E. Fritsch. 



Paulsen, Ove, Plankton-Investigations in the waters 

 round Iceland in 190 3. (Meddelelser fra Kommissionen 

 for Havunders0gelser. Serie: Plankton. Bind I. No. 1. 

 Kobenhavn 1904, PI. 1 — 41. With 11 figures and two maps.) 



A study on the Plankton-Associations and their relations to each 

 other and to the currents. The material dates from collections on board 

 the „Thor", the marine investigation-steamer of the Danish govern- 

 ment, and from an Icelandic mail steamer, the „Hölar". 



South of I c e 1 a n d Asferionella-PleLvikton predominates in early 

 Summer^ and Z.o//^//j»^s-Plankton in late summer and autumn, and it is 

 supposed that shoals of these associations are carried up along the west 

 coast one by one by the „Irminger-current". The „basin-water" of 

 Denmark straft possesses in June a Tricho-Plankton of its own, which 

 close to the ice is replaced by a Sira-Plankton. 



The boundary-line of the Plankton-associations at the south-east 

 coast of Iceland seems to be very distinctly marked, east of this line 

 we find cold water with the following associations: Chaetoceras peruvia- 

 ««m-Plankton in early summer, Ceratium arcticum - Plankton in late 

 summ.er. Here at the east coast we find only a narrow strip of neritic 

 Plankton (Ära-Plankton in early summer, Leptocylindrus-Chaetoceras- 

 Plankton in late summer)^ most likely because the neritic plankton is 

 carried away southwards by the east-I cel a ndic polar current whereas 

 at the south coast the plankton-associations extend, which is put in 

 connexion with a supposed slowness of the current here. 



At the north coast artic oceanic forms often predominate in the 

 coast plankton. 



The plankton-associations met with are, marked out on the maps. 



In the fjords where whaling stations are the plankton has been 

 examined and its quantity measured. The figures show that the presence 

 of a whaling Station does not seem to diminish the quantity of the 

 plankton, nor to change its quality. 



In the systematic part certain Plankton organisms are mentioned and 

 the following new forms described: Goniodoma Ostenfeldii, Glenodinium 

 bipes, Peridinium Islandiciim, P. roseum, P. siibinennis. 



0. Paulsen. 



Fabozzi, Salvatore, Azione dei Blastomicetl still' epitelio 

 trapiantato nelle lamine corneali. (Archives de 

 parasitologie. 1904. T. VIII. p. 481—539. Avec 9 figures 

 et PI. III.) 



Le Saccharomyces neoformans, inocule dans la cornee des Lapins 

 et des Cobayes, agit simplement ä la facon des corps etrangers; 

 il est detruit par phagocytose. Les produits intracellulaires qui se 

 colorent d'une facon speciale representent des alterations regressives des 

 cellules epitheliales. Ce Blastomycete ne produit pas de tumeurs de la 

 cornee. 



